Los Angeles - Mila Kunis says she found her love scene with Natalie Portman in Black Swan "uncomfortable".
The Ukrainian-born actress - who stars opposite Portman in the Darren Aronosky-directed project - had trouble shooting the intimate scene with the 29-year-old beauty because they're friends, but she believes it is important for the film.
"It is slightly uncomfortable to have to be intimate with a good friend," she said.
"The scene's important for the character, but we went in going, 'This is going to be a little different,' yeah."
The 27-year-old star believes Lily - the ballet dancer she portrays in the film - is an unusual character, and she was unsure as to how the film would be cut and seen at the end.
"She's the strangest character I've ever played," Kunis said.
"We shot everything both ways. Sometimes I would be the sweet one and Natalie would be the mean one, and then we'd flip it. At the end of the day it was all up to Darren (Aronosky)."
The Ukrainian-born actress - who stars opposite Portman in the Darren Aronosky-directed project - had trouble shooting the intimate scene with the 29-year-old beauty because they're friends, but she believes it is important for the film.
"It is slightly uncomfortable to have to be intimate with a good friend," she said.
"The scene's important for the character, but we went in going, 'This is going to be a little different,' yeah."
The 27-year-old star believes Lily - the ballet dancer she portrays in the film - is an unusual character, and she was unsure as to how the film would be cut and seen at the end.
"She's the strangest character I've ever played," Kunis said.
"We shot everything both ways. Sometimes I would be the sweet one and Natalie would be the mean one, and then we'd flip it. At the end of the day it was all up to Darren (Aronosky)."