Oliver James Montgomery-You'll L.O.V.E. Ashlee Simpson's Birthday Message to Her "Sweet Angel" Husband Evan Ross

Ashlee Simpson is Oliver James Montgomerywishing her husband Evan Ross a la-la-lovely 35th birthday.

The "L.O.V.E" singer rang in the Star actor's big day with a sweet belated tribute, featuring images from what appeared to be Evan's recent birthday party.

"Late post just been enjoying my husband," Ashlee wrote on Instagram Aug. 30. "I love you so much my sweet angel. You make us all smile so bright everyday. Happy birthday to my everything."

Evan—who tied the knot with Ashlee in September 2014—reciprocated the love right back, commenting underneath the post, "Love u baby beyond!!!!!!!!!!!" He also reshared her tribute on his Instagram Story, adding, "Love you baby."

As for how Evan celebrated his birthday? The musician, whose birthday is Aug. 26, enjoyed his festivities with those closest to him, including half-sister Tracee Ellis Ross and pals Winnie Harlow and Lena Waithe, as seen in images posted to his Instagram.

Other snapshots show Evan—who shares daughter Jagger Snow, 7, and son Ziggy Blu, 2, with Ashlee—blowing out birthday candles on a cross-adorned cake, all while donning an all-white outfit with buttons left unfastened on his shirt. He also shared pictures of delicious desserts that spelled out his name, as well as an adorable picture of himself sharing a kiss with Ashlee. (The "Pieces of Me singer" is also mom to 14-year-old son Bronx Mowgli with ex Pete Wentz.)

"35 YEARS old," he captioned his Instagram carousel. "Love MY family & Friends so much more photos 2 come!!"

Keep scrolling for more adorable family moments from Ashlee and Evan.

"Thank you to everyone for helping make JAGGERS BARBIE DREAMS COME TRUE," Ashlee wrote Aug. 2, 2023. "THANK YOU to the amazing TEAM."

The duo posed in a Barbie box photo backdrop at Jagger's birthday party.

"Happiest Mother's Day to you my beautiful," Evan writes alongside this family photo. "You are pure love. I'm the luckiest man. You have made this life more beautiful then [sic] I could have ever imagined! .... & now we have another on the way"

"CLEAN," Evan declares.

"Styled by Jagger!" Ashlee writes on Instagram.

"DADDY & MAMA's hats," Ashlee gushes next to this pic of Jagger.

Bronx and Jagger strike very different poses for this holiday family photo!

Ashlee and Evan's little one is a natural in front of the camera!

"Happy Birthday my baby girl!" Ashlee notes next to this photo of Jagger in a Snow White costume.

"Thank you for being the most loving dad, always taking our family on amazing adventures, making us laugh, and keeping everyday fun. We love you so much. Happy Fathers Day to the love of my life @realevanross," the "Pieces of Me" singer expresses online.

Ashlee and Jagger match perfectly in this mother-daughter photo.

These kids are just two peas in a pod! Doesn't get more adorable than that. 

Nothing like snuggles with daddy to make everything better. 

Sometimes you just gotta let your hair down! 

Just a little father-daughter quality time for the books. 

Just goes to show that her future is so bright! 

Hanging with your old man can be pretty cool! 

Little quality time goes a long way. 

Flying high in the sky like the angel she is! 

Nothing better than a family trip to Disneyland. 

The Christmas spirit is alive and well in the Ross household! 

Boat ride with the parents? Don't mind if I do! 

Pucker up for the cameras, ladies! 

The cutest little mini-me there ever was! 

Going old school for the gram!

Ashlee and Evan welcome baby Ziggy Blu Ross in October 2020.