Former Bachelor Ben Higgins turned 28 on Wednesday and his new fiancée, Lauren Bushnell, celebrated the occasion with a super-sweet Instagram post.

Bushnell, who won Higgins' heart during the most recent season of The Bachelor, shared a pic of three Polaroid photos -- one of herself, one of Ben, and one of them standing together. She captioned the cute snapshot, "HBD to this handsome man. So thankful I get to celebrate with you today and forever!"

WATCH: 'Bachelor' Ben Higgins and Lauren Bushnell Put Their Relationship to the Test on 'Jimmy Kimmel Live!'

The couple got engaged at the end of the dramatic 20th season of the hit ABC reality show, which aired March 14.

Bushnell was one of two women that Higgins said he loved during the last few episodes of the season, along with finalist Joelle "JoJo" Fletcher. While the former Bachelor didn’t ultimately pick Fletcher to be his wife, she was chosen to be the next Bachelorette.

WATCH: 'Bachelor' Ben Higgins Says 'I Love You' to Two Women, Sends One Contestant Home in Tears

Higgins and Bushnell make an undoubtedly cute couple, even if they might not know as much about each other as one might hope. Check out the video below to see what happened when the two lovebirds put their relationship to the test playing the Newlywed Game on Jimmy Kimmel Live!