Two-time Australian Olympian Genevieve Gregson has welcomed her second child into the world after a “wild” pregnancy.

The star Aussie marathoner, who is married to fellow Olympic runner Ryan Gregson, shared intimate photos of the first few moments of her second son’s life on Thursday morning.

“And just like that, he arrived,” she wrote.

Know the news with the 7NEWS app: Download today

“Meet Alfred ‘Freddy’ James Gregson, born July 2nd, 2025.

“Welcome to the world little guy. We are all just so obsessed with you.

“A beautiful and wild experience that I will be sure to never forget.”

Freddy becomes the younger brother of Archer, who was born in June, 2022.

Gregson’s post was flooded with messages of congratulations from friends and fans in the running community.

Jess Stenson, who ran alongside Gregson in the 2024 Paris Olympic marathon, was among the first.

“So precious! Hanging out to give you a big cuddle little Freddy,” Stenson wrote.

American middle-distance runner Emma Coburn added: ”Welcome to the world, Freddy!!! You have the best parents and brother.”

Gregson’s friend, Jake Shaw, said made mention of the cute name.

“Yes. Congratulations guys!! Love the name by the way,” he said.

Gregson, who turns 36 next month, fell pregnant shortly after the Paris Olympics last year, where she finished 24th in the marathon, in a time of 2:29:56.

Stenson finished 13th in a time of 2:26:45.