Isla Fisher was once mistaken for her husband Sacha Baron Cohen's daughter.

The petite 'Great Gatsby' actress - who wed the comedian in 2010 after an eight-year romance - was mortified when a party host mistook her for the funnyman's teenage daughter at one of her first ever Hollywood parties.

Isla, 37, recalled: ''When I first came to Hollywood, I went with Sacha to a very big party for 'Lost In Translation'. When we pulled up, everyone you could imagine was in this room, Warren Beatty, Jack Nicholson, Dustin Hoffman...

''This lady came straight up to me, introduced herself as Colleen and then turned to me and said, 'Come with me, I've got something to show you.' I'm thinking, 'Oh my God. I'm so excited.'

''So she takes me away from Sacha and opens this door and there's this giant pink room covered in kids' posters and there in the middle is a group of 14-year-old girls and she said, 'Everybody, this is Sacha's daughter,' and asked me if I wanted a soft drink. Clearly I should have worn more make-up!''

Isla has since settled down with Sacha and the couple have daughters aged five and two, and the 37-year-old actress admits becoming a parent is one of the best things in life.

She added to Stylist magazine: ''I think the most romantic thing you can ever do is to make a family with someone. I love being a mum and it's my favourite topic personally, but professionally I hate talking about it.''