Sienna Miller is preparing for a new role --- motherhood!
The "G.I. Joe" actress and her boyfriend, actor Tom Sturridge, are expecting their first child together but still no plans of getting married.
A source told the US mag., "Friends are really happy with (Sienna's) relationship with Tom. He's younger, yes, but he's mature and he's a good guy," source added, "don't have plans right away to marry, if at all."
The couple began dating March 2011 after her split from on-and-off partner Jude Law.
Despite her failed romances, Miller seems to have found the one for her.
[Photo courtesy of PacificCoastNews.com]