Matthew McConaughey is celebrating his mom's milestone birthday!

The Sing 2 actor, 52, honored mom Kay on Instagram Friday when he helped ring in her 90th birthday.

McConaughey shared a photo of Kay smiling while wearing a birthday crown and sash reading, "90 & Fabulous."

He wrote in the caption, "Ma Mac McConaughey at 90 today— livin on joy, forgiveness, resistance, and 'not being able to imagine not being here.' - Happy birthday mom."

Kay recently moved in with McConaughey, wife Camila Alves McConaughey, and their three kids — Levi, 13, Vida, 11, and Livingston, 8 — during the coronavirus pandemic.

She opened up about quarantining in Austin, Texas, with her son

and his family on a 2020 episode of Red Table Talk, calling the experience "really, really lovely."

"I'm enjoying so much being around my grandchildren. I'm very comfortable with them," she said at the time.

"Matthew is a very good son. I tell him that all the time. He's good to me."

During a virtual chat as part of the team's schedule release party, the actor shared, "We're good man, we're down here in Texas. We've got my Mom over here, she's 88, I cannot keep up with her!"