DINERS in a busy cafe watched as movie idol Ewan McGregor and actress Mary Elizabeth Winstead sat deep in conversation, shared a passionate kiss — then left on his motorbike.

Married Trainspotting star Ewan, 46, spent more than an hour at the fashionable establishment with Mary Elizabeth, 32, who plays his lover in US telly show Fargo.

17 Married actor Ewan McGregor shares a passionate kiss with his on-screen lover in a busy London cafe Credit: The Sun

And fellow customers at The Good Life Eatery in St John’s Wood, North West London, insisted the pair appeared comfortable together.

One said: “Ewan and Mary Elizabeth were there together and seemed relaxed in each other’s company.

"There’s always lots of celebrities around in that area.

“The cafe was really busy with people including delivery drivers coming in and out the whole time.

17 American actress Mary Elizabeth, 32, sits down next to her co-star and places her left hand on his cheek Credit: The Sun

17 Ewan sits in the West London cafe looking up at his Fargo co-star Credit: The Mega Agency

“You cannot reserve a table in there and have to go to the counter to order food, so people are up and down ­constantly.

“They were deep in conversation and were there together for more than an hour. As they left she got on to the back of Ewan’s motorbike and they sped off together.”

US actress Mary Elizabeth announced her split from husband Riley Stearns in May while Ewan, 46 — who played Obi-Wan Kenobi in the Star Wars movie prequels — has been married since 1995.

In recent months he and French wife Eve Mavrakis, 51, have posted pictures of themselves without their wedding rings on their public social media sites.

17 Ewan, 46, with his French wife Eve Mavrakis, 51, at an LA gala last November Credit: Getty - Contributor

17 The pair have been married since 1995 and have four children together Credit: AFP

Mary Elizabeth met Ewan as they starred together on crime show Fargo and — in one episode — the pair were seen ­sharing a steamy bath scene.

Both had joined the FX Network cult hit for its third series, filmed on location in Calgary, Canada.

In the programme, Mary Elizabeth plays femme fatale Nikki Swango — a recently-released prisoner.

Her character enjoys an affair with probation officer Ray Stussy, portrayed by Ewan, who also appears as Stussy’s twin brother Emmit.

Talking about her character in an interview, Mary Elizabeth said previously: “This is a very interesting person with a complicated moral compass.”

17 Onlookers who saw Ewan and Mary Elizabeth smooch said the pair looked comfortable around each other at The Good Life Eatery in St John's Wood, North West London Credit: Ray Collins - The Sun

17 The pair play lovers Ray Stussy and Nikki Swango in cult US show Fargo Credit: Planet Photos

17 The pair embrace each other while filming a racy bath scene Credit: Planet Photos

17 Mary Elizabeth split from her husband and teenage sweetheart Riley Stearns in May Credit: Getty - Contributor

The programme was shot between the end of last year and the beginning of this year and was screened in the US between April and June.

Ewan and Mary Elizabeth sat next to each other at a Fargo cast ­dinner at the end of March.

And the actress told in an interview with Time Magazine how the show’s director Noah Hawley assured her that her screen character’s feelings for Ray Stussy were genuine.

She added: “Once I knew that their love was real, then I was able to really move forward with this sort of sweet, bubbly, optimistic version of a femme fatale.”

17 Onlookers said Ewan was deep in conversation with Mary Elizabeth for over an hour in the cafe Credit: 2017 Invision

17 Mary Elizabeth jumped on the back of Ewan's motorbike after the kiss Credit: Getty - Contributor

17 She met the married star while filming the third series of the US crime drama last year Credit: Getty Images - Getty

17 Ewan and his wife have been red-carpet regulars Credit: Getty - Contributor

Mary Elizabeth — a distant relative of Hollywood screen siren Ava Gardner — announced her separation from 31-year-old Riley, her teenage sweetheart, five months ago.

Writing on her Instagram page, she told fans: “We’ve decided to move on from our marriage, but we will stay best friends and collaborators for all our days.

“We are still ride or die, just in a different way now. I love you always, Riley.”

But in June Riley closed his Twitter account saying: “Keep almost tweeting stuff I shouldn’t so I am saying bye for a while.”

Druggie Renton sent him sky-high By Michael Hamilton EWAN McGregor’s first TV role was as a 22-year-old in the 1993 mini-series Lipstick on Your Collar. He starred in Danny Boyle’s film Shallow Grave a year later. But it was his role as druggie Mark Renton in Boyle’s 1996 classic Trainspotting which rocketed him to superstardom.

The Scot, born in Crieff, Perthshire, said: “I think it’s a brilliant movie and a very important one for me. It was the one that put me in the public eye more than any of the others.”

Offers poured in, including the part of Obi-Wan Kenobi in Star Wars: Episode 1 – The Phantom Menace in 1999. He also has a clutch of theatre performances under his belt, including Shakespeare’s Othello.

The star, who quit booze in 2000, moved to California with wife Eve in 2008.

But he returned to Scotland for the Trainspotting sequel released this year.

Ewan and Eve’s eldest daughter Clara — a model — was born in February 1996, the same month that the Scottish actor’s breakthrough film Trainspotting was released.

Earlier this year, Ewan and Eve were pictured on a night out at a tenpin bowling alley in New York.

In July 2015 they were pictured together at the Serpentine Gallery’s summer party in London’s Hyde Park.

17 Ewan nabbed his first TV role in the 1993 mini-series Lipstick On Your Collar when he was 22 Credit: Stay Still

17 Ewan made his big break in Danny Boyle's hit cult film Trainspotting back in 1996 Credit: Alamy

17 His oldest daughter Clara was born in the same month of his big breakthrough Credit: Getty - Contributor

17 Ewan played Obi-Wan Kenobi in the Star Wars movie prequels Credit: Lucas Films

Mary Elizabeth has been seen in a series of ­horror flicks, but is most famous for her role as Lucy in Die Hard.

She also appeared in oddball comedy Scott Pilgrim vs. the World and Smashed, a sombre drama about alcoholism.

The actress, who is from North Carolina, hit the headlines in 2014 when she became a ­victim of the iCloud hack.

The incident saw intimate photos taken for her husband leaked online.

Hilarious scene from TV show Fargo where Ray proposes to Nikki before they film a sex tape