Christina Applegate, 38, and her fianc’ Martyn Lenoble, 41, are expecting their first child.

The couple began dating in 2008 and were engaged on Valentine’s Day this year.

Applegate was diagnosed with breast cancer in 2008 and had a double mastectomy; she says she wouldn’t have made it through without Lenoble, who is the bassist for the band Porno for Pyros.

“I’m very grateful to Martyn for coming along at a time that he did because he’s been my rock through all of this,” says Applegate.

“He gave me something to really want to live for and something to smile about.”

This will be the second marriage for both and the first child. No dates have been announced for the wedding or the baby due date.