Sienna Miller Desperate for Children

British babe Sienna Miller is desperate to start a family. Sienna spent a lot of time with ex-fiancé Jude Law's children when they were a couple.

Sienna has a new man these days and apparently things are getting really serious between them. So serious that she's considering becoming a mother.

A source says, "Sienna misses the kids of her ex, Jude Law, so much that she says she can't wait to become a mum herself.

"For now though, it's all about her acting - but she really can't wait to have her own children. She and Jamie have been inseparable over the past few weeks. It certainly seems very serious."