Oscar nominee Lupita Nyong'o inadvertently ruined a male friend's love life after he took his new girlfriend to see his pal in 12 Years A Slave.

The actress tried to warn her lovestruck buddy that Steve MCQueen's movie wasn't really a date film, but he refused to listen.

Nyong'o explains, "He decided he was gonna go see the movie with a girl he was interested in; he's been on one date with this girl.

"He cries a lot and I said, 'I don't think it's a good idea'. He said, 'No, it'll be Ok, she'll see my soft side'.

"He went for the date and he sends me a text and says, 'Yo, I was crying so hard that my armpits were wet with tears!'

"It was the last date."