He's smitten!

A-Rod took to Instagram to wish his girlfriend J.Lo a happy birthday yesterday, and he couldn't help but gush about her in the process.

"Wishing a happy birthday to this amazing human being who lights up my world every day. "Te amo muneca!! ❤️#HBD #Leo," he captioned a snapshot of the singer.

The baseball star and Jenny from the Block had a joint celebration in Miami this past weekend, and it certainly seems that the MLB legend has gotten over being angry at his lady love for hiring a private investigator to follow him.

“They are one big, happy family and that will continue. Jennifer has never felt more loved and taken care of than with Alex. He is her biggest fan. He supports and encourages her every day. She has nothing but amazing things to say about him," a source recently dished to People.

We're expecting an engagement any day now!