But the Transformers star is now red hot thanks to a fiery new hairdo.
The star debuted her flaming tresses as she strolled through the airport terminal in Los Angeles on Thursday.
The 26-year-old dyed her hair to play redheaded April O'Neil for director Michael Bay's film Ninja Turtles and it definitely suits her.
Megan has just the right complexion to compliment her dark coppery locks.
She was in a hurrying mood, however, as she made her way through the crowd at Los Angeles International Airport with her husband, Brian Austin Green, and baby Noah in tow.
Megan wore black leggings and bulky boots, and hid the rest of her figure beneath a padded coat.
She walked ahead of Brian, who carried the baby's red carrier and a ruck pack on his back.
A nanny was in charge of minding six-month-old Noah.
Megan is currently working on the adventure feature Ninja Turtles as April O'Neil, a good friend of the turtles.
The actress joins a group of other female stars who've recently dyed their hair red.
Ariel Winter debued her magenta-hued tresses via Twitter last week.
Glee's Dianna Agron showed off her Jessica Chastain-inspired locks while heading to a business lunch at Kings Road Cafe in West Hollywood on Tuesday.
Read more: MailOnline
