Top Gear's new line-up has been revealed but nobody has ever heard of two of the presenters who will front the show alongside Chris Evans.

Journalist Chris Harris and German racing driver Sabine Schmitz have been selected after the likes of Jodie Kidd, Zoe Ball and Suzi Perry all ruled themselves out.

It comes as filming of the BBC show descended into chaos as two key backroom staff quit.

Sabine Schmitz, 46, is a racing driver for Porsche and BMW. She has appeared on Top Gear in December 2004, racing Jeremy Clarkson round the Nurburgring

Chris Harris, 40, is a motoring journalist who has worked as a reviewer, writer, and editor for many car magazines, including Evo and Autocar

Schmitz is a racing driver for Porsche and BMW. She has appeared on Top Gear in December 2004, racing Jeremy Clarkson round the Nurburgring.

The 46-year-old became known as Queen of the Ring in Germany, after she claimed to have gone round the track more than 30,000 times.

She hosted a German TV show called D Motor, which is a similar programme to Top Gear, where she would take on a new driving challenge each time.

Harris, 40, is a motoring journalist who has worked as a reviewer, writer, and editor for many car magazines, including Evo and Autocar.

He has his own YouTube channel, called Chris Harris On Cars, where he provides video reviews to his 321,000 subscribers.

In 2011 he was banned from reviewing Ferraris after writing an article where he described the brand as 'profoundly irritating'. Harris and Ferrari have since made up.

He is still banned from reviewing Lamborghinis, after he wrote an article with the headline 'Lamborghinis Are The Perfect Cars For People Who Can't Drive' and described the company's future as 'bleak'.

Sabine Schmitz will be a new face for British television viewers as she was signed up to present Top Gear

He has his own YouTube channel, called Chris Harris On Cars, where he provides video reviews to his 321,000 subscribers

In 2011 he was banned from reviewing Ferraris after writing an article where he described the brand as 'profoundly irritating'. Harris and Ferrari have since made up

He is still banned from reviewing Lamborghinis, after he wrote an article with the headline 'Lamborghinis Are The Perfect Cars For People Who Can't Drive' and described the company's future as 'bleak'

They will be joined by David Coulthard, 44, who drove for Williams, McLaren and Red Bull in his racing career between 1994 and 2008.

WHO ARE THE NEW PRESENTERS? Sabine Schmitz is a racing driver for Porsche and BMW. She was born in Adenau in Germany and grew up with her two elder sisters at the hotel her parents owned in Nurburg. She has appeared on Top Gear in December 2004, racing Jeremy Clarkson round the Nurburgring. The 46-year-old became known as Queen of the Ring in Germany, after she claimed to have gone round the track more than 30,000 times. She hosted a German TV show called D Motor, which is a similar programme to Top Gear, where she would take on a new driving challenge each time. Her marriage name is Sabine Reck. Chris Harris, 40, is a motoring journalist who has worked as a reviewer, writer, and editor for many car magazines, including Evo and Autocar. He has his own YouTube channel, called Chris Harris On Cars, where he provides video reviews to his 321,000 subscribers. In 2011 he was banned from reviewing Ferraris after writing an article where he described the brand as 'profoundly irritating'. Harris and Ferrari have since made up. He is still banned from reviewing Lamborghinis, after he wrote an article with the headline 'Lamborghinis Are The Perfect Cars For People Who Can't Drive' and described the company's future as 'bleak'. Harris has had a career in racing as well and won his first race, the Formula Power Audi, in 2000. Advertisement

The Scot finished second in the World Drivers' Championship in 2001. He took on the role as BBC commentator and pundit for the corporation's Formula One coverage.

Earlier this year three big names ruled themselves out after emerging as frontrunners to present the new Top Gear.

In September Evans reacted on Twitter to speculation of Ball becoming the presenter, saying: 'Hilariously inaccurate story in 2days paper. Re my good friend Zoe Ball excelling in Top Gear screen test. She hasn't even been for one' (sic).

And re-posting the original tweet, Ball, 44, hilariously joked that she would have to return all the gear she'd bought to kit herself out in.

She tweeted: 'Ohhh better take all these racing jumpsuits back #shattereddreams' (sic).

A month earlier Channel 5's The Classic Car Show presenter, fashion model turned racing driver, Kidd, ruled herself out when she emerged as a favourite for the BBC show.

She said at the time: 'Everyone every day has been asking me, am I doing it? Am I doing it? I am not, okay. But I feel greatly honoured that people think I could possibly be good enough to fill those shoes, especially as a woman.'

Formula One presenter Suzi Perry also ruled herself out after Evans hinted that she was in the frame for the job.

She said: 'I'm away 20 weeks a year doing Formula 1. So unless someone has invented 48 hours in a day… it would be pretty tough I think for me to do it.'

She also revealed that years ago she did turn down a Top Gear presenting job, saying: 'I just didn't think that I could do it.'

Meanwhile, executive producer Lisa Clark, who show boss Chris Evans personally brought in to lead its revamp announced she is quitting the show after just five months. Script editor Tom Ford has also reportedly resigned from his role.

Departing Ms Clark, who previously worked alongside the hit programme's new host as a producer on The Big Breakfast, said in a statement she was moving to new projects.

Blow: Top Gear's executive producer Lisa Clark has revealed she is leaving the show after five months. She was personally signed up by Chris Evans in July to lead the revamp of the hit motoring programme

She was hired in the summer following the departure of Andy Wilman, who will join the old Top Gear presenting line-up of Jeremy Clarkson, Richard Hammond and James May on their new Amazon motoring programme.

At the time Evans offered a glowing endorsement of his acquisition, saying: 'Lisa is as good as it gets when it comes to making big, important television shows.

'She's funny, sassy, super experienced and has always absolutely loved cars.'

Speaking about joining the show in July, Clark, who set up a production company called Pett in 2001 with Reeves and Mortimer, said: 'This is an incredibly exciting and challenging opportunity, which I couldn't resist.

'I'm confident that after 14 years, Pett can continue to make original and probably funnier shows in my absence.'

But despite the hype, Clark has now revealed she is leaving Top Gear just five months before the first episode is due to air in May.

She said: 'After an extremely busy five months I am moving on from Top Gear to new projects which I will be announcing in the New Year.

'I'd like to wish production all the very best with the show.'

A BBC statement said: 'We'd like to thank Lisa for all her incredible work over the last five months readying new Top Gear for its busy filming schedule in 2016 and planned return in May.'

The loss of Clark will not affect the production schedule for the show, a spokesperson confirmed.

Sneak preview: The news will be a blow to new host Evans, pictured during filming with F1 star Jenson Button last month, as he gave a glowing endorsement of Clark when she joined the revamped show in the summer

The BBC expects to announce a new executive producer in due course. In the meantime Alex Renton, who has been series editor on Top Gear for a decade, will take over on an interim basis.

Evans has yet to reveal many details about the new show.

Speaking at annual trade show MIPCOM (International Market of Communications Programmes) in Cannes earlier in the year, he hinted that there may not be co-hosts with him at all times.

He also recently appeared as a guest on BBC One's Saturday Kitchen and revealed the first episode would be on Sunday, May 8.

Last month Evans was pictured test driving a 200mph McLaren car with Formula One driver Jenson Button during the first glimpse of filming for the hotly-anticipated new version of Top Gear.

Clark was hired in July following the departure of Andy Wilman, who will join the old Top Gear presenting line-up of Jeremy Clarkson, Richard Hammond and James May (pictured) on their new Amazon motoring programme

The 49-year-old presenter was seen laughing with Button in a bright green McLaren 650S Spider on the BBC motoring show's test track at the Dunsfold Aerodrome in Surrey.

And fans of the long-running programme will be delighted to know that the show's legendary driver The Stig was also spotted on set in full costume during filming at the end of November.

The Radio 2 DJ has signed a three-year contract for the new series of Top Gear, and there will be two series of the show, each consisting of eight episodes.

He had hinted that there may not be co-hosts with him at all times throughout the new show, in a departure from the old format featuring Clarkson, Hammond and May.

Evans was making the most of some time off as he stepped out with his wife Natasha and their sons Noah and Eli to enjoy the winter sunshine in London on Wednesday