Olympic gold medal winner Jessica Ennis-Hill gave birth to her first child yesterday - and has posted a snap on Twitter.

The 28-year-old heptathlete, who famously scored gold alongside Mo Farah on "Super Saturday" in the London 2012 games, took to the social media site in the early hours of this morning to share her happy news.

Our beautiful baby boy Reggie Ennis-Hill was born yesterday. We couldn't be happier x pic.twitter.com/2KrMEccFSK

— Jessica Ennis-Hill (@J_Ennis) July 18, 2014

She wrote: "Our beautiful baby boy Reggie Ennis-Hill was born yesterday. We couldn't be happier x"

The pic shows the baby's hands and the lower portion of his head - along with a cute babygrow featuring a picture of a lion.

Ennis-Hill amended her surname after marrying hubby Andy Hill last May and had to pull out of this summer's Commonwealth Games in Glasgow due to her pregnancy.