Fergie and ex-Josh Duhamel celebrate son Axl's 13th birthday with never-before-seen childhood photos

To celebrate her only son's 13th birthday, Fergie shared multiple childhood photos of the now-teenager, and one of the most special was of the singer, 51, holding little Axl Jack Duhamel in her arms. She welcomed Axl with Josh in 2013. The two had been married for nearly a decade at the time.

Fergie also shared a photo of toddler Axl on her social media page that showed him looking away from the camera. In the snap, he can be seen wearing a white tee, printed shorts, a blue LA Dodgers cap, and a black-and-white pair of Converse sneakers.

Another photo in her emotional carousel post showed her son Axl as a toddler having fun inside a ball pit. The little blonde boy can be seen wearing a black T-shirt while adorably holding an orange ball in his hand.

Fergie's slideshow of images also included a photo of a school-aged Axl posing in front of bamboo trees, sporting his signature blonde hair and a white T-shirt. In her birthday post caption, Fergie said, "It’s so beautiful to watch you grow into the kind, silly, and cool dude you are. You are so tough bruh."

Josh Duhamel also poured out his love for Axl as he wished his son a very happy birthday on social media. The actor, 53, posted an old selfie of his toddler son as he wrote, "Guess who’s a TEENAGER!? That went fast. I love this dude so much," while calling him "kind and thoughtful."

Josh Duhamel's Instagram update was all about Axl's adorable baby pictures. One of the snaps showed a very tiny and chubby Axl looking directly into the camera with shiny eyes and a cute little smile.

Josh Duhamel's carousel of images showed baby Axl posing in a gray onesie adorned with blue star prints. Speaking about co-parenting Axl with his ex, Duhamel had previously told Megyn Kelly, "We have a really good relationship, thankfully. She’s a good person, she’s a good mom. Thankfully, she and my wife [Audra] have a good relationship."

Josh Duhamel's post also showed baby Axl enjoying a ride in his walker. However, the teenager has now become a big brother, as his father welcomed his younger son, Shepherd and daughter, Rocca de Leon, with his second wife, Audra Mari. More recently, Duhamel also enjoyed a Universal Studios vacation with Axl, Mari and Shepherd.