Exes Fergie and Josh Duhamel shared rare photos of their son, Axl, on Saturday in honor of his 13th birthday.

“Guess who’s a TEENAGER!?” the actor, 53, wrote via Instagram over the weekend. “Holy crap that went fast.

“I love this dude so much,” the “Ransom Canyon” star continued. “I couldn’t have asked for a more kind, compassionate and thoughtful kid. HAPPY 13th B-DAY AXL JACK!!!”

The social media upload included a slew of throwback snaps of the birthday boy, while Fergie’s carousel also highlighted more recent moments

“13. 🎂🎂 Wow, my teenager,” the former Black Eyed Peas member, 51, captioned her slideshow. “I’m saying that with tears in my eyes as I feel like the world is shifting beneath us.”

She continued, “It’s so beautiful to watch you grow into the kind, silly, and cool dude you are. You are so tough bruh 🤣🤣. Happy 13th Axl Jack. I love you.”

In the photos, Axl smiled for a selfie while out to eat with his mom, posed with friends and showed off a school project.

Fergie gave birth to her baby boy in August 2013, with the singer and Duhamel going public with their split four years later.

The duo finalized their divorce in November 2019.

Duhamel has gone on to welcome two more children — son Shepherd, 2, and daughter Rocca, 3 — with his wife, Audra Mari, whom he wed in September 2022.

When Duhamel and Mari’s youngest arrived in May, Fergie sweetly showed support for her ex’s expanding family by “liking” Rocca’s Instagram debut and commenting with heart emojis.

Duhamel raved over his and the Grammy winner’s co-parenting dynamic in a March appearance on “The Skinny Confidential” podcast.

“[Fergie and I] have a great relationship. She and Audra have a great relationship,” he said during the episode. “

Duhamel doubled down on this during a “The Megyn Kelly Show” interview that same month, insisting “everybody is just copacetic.”

He added, “She’s a great mom. I’m extremely happily married now to my wife, Audra [Mari]. … [They] have a great relationship, which is what I really care about.”