Serena Williams and fiance Alexis Ohanian have shared photos of their new baby daughter on Instagram Stories.

In a post on the social network, they announced her name, Alexis Olympia, and birth weight of 6lb 14oz.

Then in a cute twist, they also added her number of Grand Slam titles - 1, as Serena was pregnant when she won the Australian Open in January this year.

They then added a photo of baby Alexis - born on September 1 - in her mother's arms.

And Serena posted another photo on her Instagram page.

Meanwhile, Alexis Senior shared a video of Alexis Junior's life so far on YouTube.

Congratulations to the proud parents!