Eddie Redmayne had a "big moment" when he sang with Taylor Swift.

Eddie Redmayne

Eddie Redmayne

The 34-year-old actor - who has five-month-old daughter Iris with wife Hannah Bagshawe - has laughed off rumours he and the 'Blank Space' singer dated in 2011, but he did admit to being impressed by her when she auditioned for a role in 'Les Miserables'.

Asked by a caller on 'Watch What Happens Live' if he could put "rumours to rest" and confirm if he'd dated Taylor, he replied: "I absolutely can put the rumours to rest. I never went out on a date with Taylor Swift. Although, I met Taylor Swift...

"She was amazing in the audition [for 'Les Miserables']. So we got to sing together, which was a big moment for me. But, no, we never went out."

Eddie also defended "formidable" Anne Hathaway, after host Andy Cohen mentioned she had received a lot of unexplained criticism after her work on the musical.

He said: "I honestly don't know [why she was criticised] because I think she's formidable and I think she was kind of extraordinary in that film.

"It was an amazing thing when we were making 'Les Mis' because we were doing it live and it was the first time any of us had done it...She basically educated the rest of us on how to do it."

Eddie recently revealed he is enjoying his first "proper break" now he's finished work on 'Fantastic Beasts and Where To Find Them' and is happy spending time at home with his wife and daughter.

He explained: "By the end of 'Fantastic Beasts' I was zonked. And Hannah was pregnant. So I've taken time off. Iris arrived and it's been so lovely. It's the first time I've taken time off properly."

However, the British star admitted he isn't coping well with sleep deprivation and is constantly worrying about his daughter.

He explained: "We're still at the stage of getting through the night, trying to keep our child alive. I don't think I've got past the sleep deprivation yet to get to a point of having a more philosophical take! We're just scrabbling through in the most wonderful way."