The pair walked the red carpet together at the 67th annual Tony Awards in New York on Sunday (8 June), just a few months after tying the knot in secret.
Leighton channelled old Hollywood glamour in her fitted white Antonio Berardi dress and curled hair, while Adam looked dapper in a smart suit and tie.
The teen icons have kept their romance largely away from the spotlight – so much so, they never confirmed their marriage until after the event.
Leighton and Adam met on the set of 2011 film The Oranges and went on to marry in February 2014, on what was apparently their first anniversary.
They will appear together in upcoming romantic comedy Life Partners.
Discussing working with Adam earlier this year, a very coy Leighton would only say: "Of course [I enjoyed working with him]. I always want to work with people I like and love and that I'm friends with, so it's nice to mix business with pleasure, I guess."
Leighton rose to fame as Blair Waldorf in Gossip Girl, while Adam won our hearts as Seth Cohen in The O.C..
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Stars who married in 2014 in pictures:
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