The 'Samantha Who' actress is set to tie the knot with musician Martyn LeNoble after he popped the question on Valentine's Day (14.02.10).
Her spokesperson confirmed in a statement: "The couple, who have been dating for two years, got engaged on February 14, 2010. There is no set date for the wedding at this time."
The 37-year-old actress – who battled breast cancer in 2008 – has admitted she wants to start a family with the 41-year-old Porno for Pyros rocker.
She said recently: "What's next' Babies, lots of babies. Not lots of babies, but a couple."
Christina – who had a double mastectomy after being diagnosed with cancer in August 2008 – has previously credited Martyn for helping her overcome the disease.
She said: "I have a small but mighty support system and Martyn has really been an incredible part of my life. Without him, I don't know if I could've gone through any of it. He came around at a time when there was a lot of loss in my life on many levels, so he's been a really incredible help."
This will not be the first trip down the aisle for either star.
Christina filed for divorce from actor Johnathon Schaech in 2005 – four years after they married – citing irreconcilable differences, with the end of their union made official in August 2007.
It will also be Martyn's second marriage.