Hugh Bonneville is pictured with another new flame one year on from marriage split and just months after dating actress. See the Mail’s exclusive photos

  • Scroll down to see the Downton Abbey star’s new flame during their night out

It seems that Hugh Bonneville has taken up his role as the chivalrous Lord Grantham. He quickly opened the door of his limousine to show off his crush, before diving into the car first when he saw photographers.

The 60-year-old Downton Abbey and Paddington star was spotted with the vegan influencer on his arm last week, a year after he split from his wife.

The Canadian wore a stunning red dress with a plunging neckline and was his guest at a cocktail party celebrating the end of filming for the third Downton Abbey film.

It is the third time the couple has been seen together recently.

His new flame is Heidi Kadlecova, a passionate vegan food advocate on social media.

In March, the Bafta-nominated star was thought to be in a relationship with Canadian actress Claire Rankin, who was spotted leaving his London apartment on several occasions. However, it now appears he has left the 53-year-old.

Hugh Bonneville arrives at Downton Abbey cocktail party with Heidi Kadlecova

The actor opens the car door for Ms. Kadlecova after the event

The actor opens the car door for Ms. Kadlecova after the event

Divorced philanthropist Ms Kadlecova describes herself on social media as a “world traveller” and “animal activist”.

They first appeared together in public on July 8 at the premiere of the film Twisters, starring Downton actor Harry Hadden-Paton. She wrote on his Instagram account: “What a fun night and you are absolutely amazing in this film.”

Two weeks later, she and Bonneville posted the same photo at the same time on the opening night of Fangirls, a new musical at the Lyric Theatre in Hammersmith, west London. A source told The Mail on Sunday at the time that “they gave themselves away on Fangirls” and were “clearly sitting together”.

Vegan influencer Ms Kadlecova pictured on Instagram

Vegan influencer Ms Kadlecova pictured on Instagram

Last week, the couple arrived at the Downton Abbey party at The Cross, a speakeasy-style bar in King’s Cross, in a chauffeur-driven white BMW at around 8pm.

In a display of bravery befitting Lord Grantham, Bonneville went to open the car door for Mrs Kadlecova two hours later as they were leaving – but quickly ducked inside himself when he realised he was being photographed.

He is not yet divorced from his wife of 25 years, Lulu Williams, 56. The couple, who lived in West Sussex and have a grown-up son, Felix, announced their separation last September. He has reportedly joined the celebrity dating app Raya.

Bonneville with his wife, Lulu Williams. They are still not divorced after 25 years of marriage

Bonneville with his wife, Lulu Williams. They are still not divorced after 25 years of marriage

The star was believed to be dating Canadian actress Claire Rankin in March

The star was believed to be dating Canadian actress Claire Rankin in March

Bonneville called her his “pillar of strength” and “anchor point,” but after they split, a source said, “Lulu feels like 20 years of marriage means nothing.”

Ms. Kadlecova has worked with non-governmental organizations in Uganda, Indonesia and Nepal. While married to attorney Richard Coglon, they lived in Vancouver with their daughter Gabrielle.

Her social media accounts suggest she believes meat and animal products are linked to diseases, including cancer. She has also acted, playing a mother in Pintu, a 2016 film about domestic violence.

Bonneville’s spokesman declined to comment last night.