Speculation that their relationship is heading for marriage has reached fever pitch in recent months.

And Meghan Markle is said to have quit her highly successful role on Suits amid claims she will announce her engagement to Prince Harry before Christmas, reports The Daily Star Sunday.

The American actress, 36, who found fame as feisty paralegal Rachel Zane on the popular US drama is 2011, has reportedly told TV bosses that she will not be returning for the show's eighth season next year.

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Romance: Meghan Markle is said to have quit her highly successful role on Suits amid claims she will announce her engagement to Prince Harry before Christmas, reports The Daily Star Sunday

Hit role: The American actress, 36, who found fame as feisty paralegal Rachel Zane on the popular US drama is 2011, has reportedly told TV bosses that she will not be returning for the show's eighth season next year

A source told the website: 'Meghan knows she can't really act at the same time as being a princess and is happy to make this career sacrifice.

'She really enjoys her charity work with Unicef and will broaden out her charity commitments when she becomes a full-time royal.'

The brunette beauty will reportedly wrap up filming next month, with the couple said to announce their plans to wed before the festive period.

Mail Online has contacted Meghan's representatives for comment.

Hotting up: A source told the website: 'Meghan knows she can't really act at the same time as being a princess and is happy to make this career sacrifice'

This comes after royal sources exclusively told the Daily Mail that the couple are house-hunting in Oxfordshire and are particularly interested in high-end properties tucked away in the rolling Cotswold hills.

A good friend of Harry's says the Prince, whose father's residence, Highgrove House, is in the south Cotswolds, has a long-standing affection for the area, while Meghan is said to be entranced by its rustic charm.

'He is searching for a new home in the area,' the friend reveals.

'Before Meghan, he was vaguely looking in Norfolk, but didn't find what he wanted. Now, with her input, he's renewed his search.'

Big plans: This comes after royal sources exclusively told the Daily Mail that the couple are house-hunting in Oxfordshire and are particularly interested in high-end properties tucked away in the rolling Cotswold hills

Smitten: A good friend of Harry's says the Prince, whose father's residence, Highgrove House, is in the south Cotswolds, has a long-standing affection for the area, while Meghan is said to be entranced by its rustic charm

The couple have tested the water with two mini-breaks, in February and July, at Soho Farmhouse, the private members' club-cum-hotel in Great Tew, which has become a haven for stars who want to go under the radar.

With the show primarily filmed on location in Canada Meghan was reportedly ‘considering her future’ last week as her relationship with London based Harry, 33, gathers momentum.

A source told The Sun: ‘Meghan loved playing Rachel and feels she owes so much to Suits. But Harry can’t move to Toronto, so she’ll have to move eventually if they want to be together.

Decisions:With the show primarily filmed on location in Canada Meghan was reportedly ‘considering her future’ last week as her relationship with London based Harry, 33, gathers momentum

‘Her decision to give up the biggest role of her career would mean a lot.'

Meghan's relationship with Harry has become increasingly serious over recent months, with the actress - who lives in Toronto - making frequent transatlantic flights to spend time with the Royal at his Kensington Palace home.

Speaking to Vanity Fair in September, she publicly acknowledged their romance for the fist time, admitting they had been dating for months before it was first reported in 2016.

'We're two people who are really happy and in love,' she said. 'We were very quietly dating for about six months before it became news, and I was working during that whole time, and the only thing that changed was people's perception.'

The couple made their first public appearance together at Harry's Invictus Games - a paralympic sporting event for wounded, injured or sick army veterans - in October.

And separate sources claim they already have their wedding plans locked down and are as 'good as engaged'.

Opening up: Speaking to Vanity Fair in September, she publicly acknowledged their romance for the fist time, admitting they had been dating for months before it was first reported in 2016.

Speaking to E! the well-placed insider revealed the couple have been discussing the idea of marriage for some time.

The source said: While Meghan may not be wearing a ring or a formal engagement announced, it's fair to say they're as good as engaged now.'

'They've spoken about their marriage plans openly with each other, and friends and family around them are pretty much thinking about wedding attire already!'

MailOnline has contacted a representative fro further comment.