Sara De Boer / Retna Digital 1 / 3
Sara De Boer / Retna Digital 1 / 3

Newlyweds Heidi Montag and Spencer Pratt are leaving Mexico -- where they've been wearing face masks to protect themselves from swine flu while filming Montag's music video, "Sex Ed."

"On the plane -- L.A. here we come!" Montag posted on Twitter. "Home, sweet, home."

See Heidi and Spencer's wedding album.

Montag admitted she was "so sad to leave Mexico," but "ready to get out of pig flu country!"

On Tuesday, Pratt told Ryan Seacrest that they're "definitely wearing facemasks everywhere.

Look back at Heidi and Spencer's 13 cheesiest moments.

"I'm not playing -- I'm not trying to get pig flu," he added. "We're in isolation, we're in full hiding."

Montag and Pratt wed in front of Hills pals Audrina Patridge, Brody Jenner and Lauren Conrad Saturday.

Check out photos from Heidi and Spencer's first wedding.

"I can't believe I'm married!!!!!!!!" Montag tweeted. "So soooo excited -- Mrs. Pratt!"

Up next for the couple: their honeymoon!

"I'm ready for a honeymoon!!!" Montag wrote. "Done with my music video...best one yet! Get ready."

See Hills stars in bikinis.

The couple is discussing "going to Tahiti or Fiji, somewhere tropical and exciting," Pratt said yesterday.

When asked if MTV is footing the bill, Pratt replied: "We'll see. Since it is a recession, we might just be going to Santa Monica Beach!"