The former England and Liverpool football captain posted the snap of his son grinning as he has his chest tickled, on Instagram on Monday 8 May.
Two days earlier the proud new dad shared the first photo of Lio, showing him napping.
Gerrard announced the birth of his son on Instagram on 29 April with a post that read:
“Lio George Gerrard was born this morning at 4.55am. Both are doing great. Our family is complete ❤️”
The Gerrards clearly have a penchant for baby names beginning with L as they are also parents of three daughters: Lilly-Ella, 13, Lexie, 10, and Lourdes, five.
Alex announced she was pregnant on 28 October 2016 by sharing a black and white photo of her three daughters all clutching a photo of the baby scan.
“We are all very excited for our new baby to arrive next year,” she tweeted. “Number four.”