Brantley Gilbert celebrated his 28th birthday yesterday (1/20) with a proposal to girlfriend Jana Kramer! 

"We could not be happier!" the couple tell PEOPLE exclusively in a statement from their rep. "We are so excited to share this special time with our loved ones and cannot wait to start the rest of our lives together."

They've been dating less than a year and recently announced they had moved in together. 

Gilbert rented out the  historic Ryman Auditorium Theater in Nashville for the day where the proposal took place.

"I was so surprised!" admits Kramer, 29. "He asked my mom for permission before he proposed, which meant a lot to me."

~Vanessa

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