Johanna Leigh Griggs (born 17 October 1973) is an Australian former competitive swimmer and television presenter.
She won a bronze medal at the 1990 Commonwealth Games.
Griggs has been at the Seven Network since 1993 where she joined Seven Sport, first as a host at the Australian Open.
She hosts the network's Olympic Games, Commonwealth Games and the Australian Open, as well as being a presenter of their Melbourne Cup coverage.
She has been the host of Better Homes and Gardens since 2005 and House Rules from 2013 until 2019.