They're back from Down Under!

After filming The Voice's grand finale in Australia, Good Charlotte's Benji Madden and his new wife Cameron Diaz jetted out of Sydney on Monday morning and back to Los Angeles. Even though he was on duty working -- it seems as though the musician wanted his lady love by his side!

For the long flight, the 43-year-old actress went for a casual white sweater, skinny jeans and booties. Benji looked cool in an all-black, which he paired with black and white running shoes. The duo were married secretly back in January and despite their hush hush romance -- things seem to be going along swimmingly!

Rumors have also been flying around that Cameron is expecting her first child with Benji -- which would be amazing news for the aging actress.

A source told Australian mag NW, "It's no secret they've been trying for a baby for a while, and the fact she's flown out to be with him Down Under has everyone buzzing that it's finally happened."

We're crossing our fingers!