Christian Horner and his wife, former Spice Girl singer Geri, have announced the arrival of their first child together.
Geri Horner (née Halliwell) broke the news on Twitter on Saturday morning, saying: "Christian and I are delighted to announce our baby boy was born this morning weighing 7lbs 8oz."
The 43-year-old, who already has a ten-year-old daughter called Bluebell Madonna from a previous relationship with screenwriter Sacha Gervasi, added a baby and bottle emoji to her tweet.
Horner himself later posted a picture on Instagram that included the caption: "Montague George Hector Horner arrived this morning, a beautiful little brother for Bluebell and Olivia #amazing-day #grateful #monty."
Geri and Christian married in an intimate ceremony in Bedfordshire in 2015, with Bluebell serving as her mother's bridesmaid. Horner also has a three-year-old daughter, Olivia, from a former relationship.
The tweet garnered almost 1000 likes in just twenty-five minutes. It received a quick response back from Geri's former Spice Girls band mate Emma Bunton who was herself celebrating a birthday.
"Amazing news, so happy! #Birthdaytwins #Birthdaymade love you all. Xxx'," she tweeted in reply.
Geri recently confirmed that she was pulling out of the forthcoming Spice Girls reunion in order to to focus on her family.
GALLERY: F1 drivers' wives and girlfriends
Keep up to date with all the F1 news via Facebook and Twitter