The We're The Millers star was spotted exuding her usual effortless chic as she arrived to catch a flight at LAX on Monday (12 August).
Jennifer had earlier appeared on Australian radio to chat about her new movie and, of course, the inevitable questions about her engagement to Justin Theroux and plans to start a family.
"Apparently we had a secret wedding this weekend," joked Jennifer during a call to the Kyle and Jackie O Show. "There was no wedding this weekend!"
As for those pregnancy rumours, she laughed: "There is nothing to announce. That is just a couple of pounds."
Jennifer spent the weekend throwing fiancé Justin a star-studded 42nd birthday bash at their home in Los Angeles, attended by pals including Kristen Bell, Isla Fisher, Jason Bateman and Ellen DeGeneres.
She recently said despite constant speculation about her personal life being tiresome at times, she does appreciate that people care about her happiness.
"I think it's very sweet that people want everything for me," she told Good Morning America on 7 August. "I'm so content and I'm so happy where I am."
Jennifer and Justin became engaged on his 41st birthday last year.
Celebrities rock airport chic - pictures
Copyright: Rex Features