Former Gossip Girl star Leighton, who it has emerged married The O.C's Adam Brody in November, shared the fresh-faced snap on Instagram yesterday (27 February) and still looked super flawless as she beamed for the camera.
She can also be seen wearing a checked shirt and a brown beanie hat, while holding up a copy of The Grapes Of Wrath, in tribute to writer John Steinbeck.
Leighton added the caption: "Celebrating John Steinbeck's birthday today w/my @miceandmenbway family. @penguinclassics."
Unfortunately, her left hand is hidden from view in the picture, so we are yet to catch a glimpse of her wedding ring!
It was revealed on the weekend that actress and fashionista Leighton is now married to longtime boyfriend Adam and he confirmed the happy news to photographers in LA earlier this week.
They are thought to have tied the knot back in November.
Leighton is currently gearing up for an exciting role in the Broadway adaptation of Of Mice And Men, starring alongside Hollywood actor James Franco.
Of Mice And Men was in fact written by John Steinbeck too, which would explain why the brunette beauty was so eager to sing his praises in her no make-up selfie yesterday.
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