He undertook the chivalrous act as Megan had just finished getting her make-up done in her trailer.
Attempting to shield the actress away from the prying eyes of the paparazzi, he followed the brunette bombshell wherever she went.
In a pair of purple Victoria's Secret tracksuit pants, a stripy T-shirt and quilted coat, Megan was not her usual glamorous self, but still looked great.
With minimal make-up, the 24-year-old looked flawless as she made her way to a waiting car to take her on-set.
She also had her hair in rollers as she prepared for her close-ups.
Brian accompanied his wife leaving in the vehicle with her.The former Beverly Hills 90210 star is taking time out from filming his reoccurring role of Keith Watson on the hit show Desperate Housewives.
Equally, Megan has been working hard on the set of her new film in which she stars alongside Mad Men actor, Hamm.
Braving the sub-zero temperatures in New York, she has been filming Friends With Kids since the start of this month with hardly any breaks.
While Megan has been on the east coast and Brian on the west coast in LA, their latest reunion is the first time the couple have been spotted together since she has started work on the film.