Brie Larson was starstruck when Nick Viall turned up to her 'Bachelor' viewing party.

The 27-year-old actress regularly hosts screenings of the reality show at her Los Angeles home and couldn't believe it when the star of the current series made a surprise appearance last month after finding out about her plans through a friend of a friend.

She said: ''I got freaked out and starstuck. The day before, I was like hugging Meryl Streep and I was like, 'This is fine,' But then Nick showed up at my house.

''He was really cool about it but we were all really nervous. He came with his best friend so we thought it was gonna be like fine and we always kinda gather an hour before the show starts so we can sort of catch up, drink some red wine. So he came for that part and I figured he would just leave afterwards.

''So then after an hour, when we're gonna watch the show, his friend was like, 'OK, I'm gonna leave Nick here, I gotta go on a date.'

''So he just stayed and we were like, 'We are gonna watch the show now,' and he was like, 'Yeah, I'm gonna watch it with you.'

''He stayed until the very end. The second it was over, I mean, the second it was over, he turned to me and was like, 'I need a Lyft now.' So I had to call him a Lyft.''

But despite having Nick in her house for the whole evening, the 'Room' actress was too ''nervous'' to speak to him and instead sneaked photos of the 36-year-old hunk to send to her friends.

She added to talk show host Jimmy Kimmel: ''He had such a good sense of humour about the whole thing. I was just so nervous. I don't think I said anything to him the whole time because I just was like hiding, like taking photos and sending them to Amy Schumer, being like, 'Uh, why did this happen? I'm too scared, I'm too shy.'

''I ordered him his Lyft and he walked out.

''I said, 'You have such a good sense of humour, I'm so glad you're so okay with all of this' and he was like, 'Yeah, I was gonna say the same thing about you.' And he just got in his Lyft.

''And I came back into the house and was like, 'I can't believe that this just happened. Nick thinks that I'm OK.' ''