Michelle Dockery has revealed the Non-Stop cast let their hair down with a karaoke night.
"We had a great night out in New York when we did karaoke, which was brilliant. It was 'Non-Stop' karaoke, as we called it because we just kept going until the early hours," she said.
Despite her musical background, jazz singer Michelle joked she may have scared off her castmates with her singing.
"With karaoke, I get overly confident after a few drinks so I think I can sing like Whitney Houston - and I can't, so I just end up embarrassing myself," she admitted.
"So what starts as, 'Michelle's got a really good voice', by the end, they are like 'Shut up!'. I always try to sing How Will I Know, which is probably the highest note ever in a song. it normally starts quite easy with a lower key and then I just go a bit nuts."
The 32-year-old, who is best known for playing Lady Mary Crawley in ITV's period drama series Downton Abbey, revealed the cast and crew also lightened the atmosphere by playing games.
"We busy ourselves with charades and silly games and we got up to all sorts. It was really fun. Lupita was really good at charades and Corey Hawkins was brilliant," she said.
:: Non-Stop opens in cinemas on February 28.