Just a few months later, they joined forces to launch the alternative indie band, Rebel And A Basketcase.Zach, who studied at the prestigious Juilliard school in Manhattan, first sparked dating rumours when they were spotted getting close on the red carpet at the Critics' Choice Awards on December 11 last year.
Now, the actress appears to be singing to a different tune, praising the attributes of non-American men.
"Well, there's something about British men that's very charming and well mannered," she told the Telegraph.
The couple were spotted holding hands and kissing at the event, however had not gone public with a relationship prior to this.
This will be Evan's second marriage, following her divorce from Billy Elliot star, Jamie Bell.
Even if they are just friends, they would make a cute couple!
WW bud @benbarnes nominated me 2 sing a bit of @Hamilton Musical.
What do Evan Rachel Wood and her boyfriend, Jamie Bell, have in common with the British royals and Jennifer Aniston and Justin Theroux? Wood and Bell, who rarely make joint red carpet appearances, were seen out and about together in Los Angeles.
It was easy to tell they were a pair, but a bit harder to make out who was who... We're used to Evan Rachel Wood's unconventional taste, which has included hats and pantsuits on the red carpet.
And no matter how much Evan and Jamie match, it can't be worse than the unforgettable denim nightmare that was Britney Spears and Justin Timberlake.
Check out the couple and tell us your thoughts: is matching your outfit to your boyfriend/girlfriend's ever OK?
Sure, it's just your classic friends pic, but what's catching people's eyes is the fact that Mara, 32, is resting her head on 29-year-old Bell's bare chest!