Jennifer Aniston plays a mom undergoing artificial insemination in her new flick, 'The Switch', to get pregnant.

Off screen too, Aniston said that if she were to ever require a sperm donor, she would 'wanna know the guy'.

According to The Daily Telegraph, the Friends star revealed this on Jay Leno's Tonight Show, where she was present to promote her new movie and perfume Jennifer Aniston.

In 'The Switch', Aniston plays singleton Kassie who is desperate to have a baby.

Ignoring the objections of her best friend, Wally (played by Jason Bateman) she decides to go it alone.

Kassie chooses a handsome and charming donor but before she can complete the act of insemination, unbeknown to her, a drunk Wally swaps the sperm for his own. (ANI)