Emma Thompson photobombs Lupita Nyong'o on Screen Actors Guild award red carpet

Thompson snuck up behind Nyong'o at the awards ceremony in Los Angeles

Emma Thompson photobombs '12 Years A Slave' actress Lupita Nyong'o at the Screen Actors Guild awards (Reuters)

She is better known for her roles in classic British films, but last night Emma Thompson let her hair down to photobomb actress Lupita Nyong’o (scroll to see video).

Taking a leaf out of Jennifer Lawrence's book, Thompson crept up behind the 12 Years A Slave actress to pull a funny face as she was having her photograph taken at last night’s Screen Guild Awards.

But Nyong’o, who went on the win Best Supporting Actress at the ceremony, was quick to laugh off Thompson’s prank and the two embraced on the red carpet.

Thompson was nominated at the Screen Guild Awards for her leading role in Saving Mr Banks, which sees her star alongside Tom Hanks.

The actress was pipped to the post by Cate Blanchett who took home the award, and now looks more likely than ever to pick up the Oscar in March for her performance in Blue Jasmine.

American Hustle won the top honour at the ceremony, taking home the Outstanding Performance by a Cast in a Motion Picture award.

Matthew McConaughey and Jared Leto also both won for their performances in Dallas Buyers Club, in which they play AIDS patients trying to smuggle drugs across the Mexican border in the Eighties.