Leighton Meester certainly welcomed her 28^th birthday with bliss. Just a few months ago, the 'Gossip Girl' actress secretly married Adam Brody. Mrs. Brody might be too happy that she opted to welcome her birthday in a simple way - by walking her dogs! Prior to meeting the 'O.C.' actor, here's Leighton Meester's boyfriend list.

Sebastian Stan (2007-2010)

Thanks to 'Gossip Girl', Leighton Meester and Sebastian Stan were able to meet. Stan played the role of Carter Baizen in the hit CW series.

"I've only had one experience where it was really hard and I was really sad when it ended. But that's what taught me a lot about myself and love and life - and that's good," said the 'Montecarlo' actress to Seventeen magazine about her breakup with Baizen.

Garrett Hedlund (2011)

Leighton Meester and Garett Hedlund met on the set of 'Country Song'. While the two did not confess the status of their relationship, one insider previously told Ok! Magazine that the two indeed hooked up.

Aaron Himelstein (2012-2013)

Leighton Meester and Aaron Himelstein actually started to date in 2007 when they both worked on the film 'Remember the Daze'. They parted ways but eventually reunited in 2012 after being spotted kissing in Rio de Janeiro, Brazil during a vacation. However, the relationship still didn't work out.

Adam Brody (husband)

The 'Roomate' actress met Brody on the set of 'The Oranges'. Just like in most of her relationships, the brunette beauty chooses to be very private with her relationship. The couple only confirmed their marriage when they both appeared in public wearing wedding bands.

Leighton Meester and Adam Brody appear not to have publicly celebrated the brunette beauty's birthday. Nonetheless, she thanked her 'Of Mice and Men' fellow cast members for the balloons and cards that she received: "On Broadway for my birthday. Couldn't get any better."