Gillian AndersonWhile some celebrity mums-to-be are all about exercise and keeping in shape while they’re pregnant, Gillian Anderson has said she has other plans entirely.

At the premiere of the new X-Files film X-Files: I Want to Believe this week, she told Us Weekly: “The only thing I do when I’m pregnant is eat and sit on my butt!

“I’m not really craving anything, but there’s the lazy part of me that thinks, ‘What’s the point in working out until I have the baby?’ Then we’ll actually do something!

“I know that’s not necessarily the right way to look at it but that’s just me.”

Gillian is six months pregnant with her third child: she and partner Mark Griffiths welcomed son Oscar in 2006 and Gillian also has a 13 year old daughter Piper from a previous relationship.