{blackbabes} Cameron Diaz and Nicole Richie Step out for a Valentine's Day Double Date

Cameron Diaz and Nicole Richie Step out for a Valentine's Day Double Date

Cameron Diaz and Benji Madden shared their first Valentine's Day together as a married couple – but they weren't alone.

The couple, who wed on Jan. 5, were joined by Madden's twin brother Joel and wife Nicole Richie for a double date in Santa Monica, California.

Diaz, 42, added a pop of color to her knee-length black dress with a red lip while Richie, 33, and the Madden brothers, both 35, sported all-black separates.

Though Diaz and Benji have had plenty of alone time since their wedding – namely a Wyoming honeymoon and a "kiss cam" lip lock at a Jan. 27 Lakers game – the dinner date at Giorgio Baldi was just the latest family affair for new in-laws Diaz and Richie. They were also spotted on Jan. 25 having brunch at the Beverly Hills Four Seasons with Joel and Richie's children Harlow, 7, and Sparrow, 5.

With all this family bonding, could speculation that Diaz will follow in her husband's footsteps and appear on an upcoming episode Richie's reality series #CANDIDLY NICOLE be gaining steam? Only time – and, doubtless, a few more adorable double dates – will tell.