So honored to be on this crazy ride called life with you,"

Nick Jonas wrote to his wife, Priyanka Chopra Jonas, on her 40th birthday

Nick Jonas is still on cloud nine with his wife, Priyanka Chopra Jonas!

The "Jealous" singer, 29, celebrated her birthday on Monday, praising

Priyanka as "the jewel of July" in a special carousel of photos uploaded to Instagram.

He also included a photo of the Unfinished author holding up a sign that read, "Happy Birthday Priyanka, 80's baby!"

Happiest birthday to my ❤️," Nick captioned the post. "So honored to be on this crazy ride called life with you. I love you. @priyankachopra."

The couple welcomed their first child together –– a daughter, Malti –– via surrogate in January.

It is certainly life-changing," Jonas told Entertainment Tonight earlier this

month of being a father. "[Malti] is amazing. It brings me a lot of joy.