Showbiz
Rex Features
According to Page Six, the former OC actress was overheard telling a passenger on a US flight that she is planning to tie the knot.
"A man sitting in front of her on the plane saw a ring on her finger and asked if she was married," revealed an unnamed source.
Ths star reportedly replied: "I'm not married yet, just engaged. I know I look like I'm 15, but I'm actually 27."
Bilson and Christensen, who met on the set of 2008's Jumper, are known for being very discreet about their relationship.
Representatives for the actress have not commented.
Related Stories
Ten Things About...
Ten Things About... Ridley ScottWe find out ten fast facts about the English producer and director.
Interviews
'Angels' Share' Ken Loach interviewKen Loach, Paul Laverty and Paul Brannigan on their whiskey-soaked comedy.
Fashion & Beauty
Duchess of Cambridge's memorable momentsFlick through a gallery of Kate Middleton's stand-out public appearances.
Celeb Birthdays
Marilyn Monroe: Life and career in picsFlick through our gallery on what would have been Marilyn's 86th birthday.
