Since 2003, Deeley has been a patron of London's Great Ormond Street Hospital for sick children.
In December 2009, she was made a UNICEF UK ambassador.
In January and February 2010, Deeley hosted So You Think You Can Dance in the UK.
Also, in February 2010, Cat filled in for a holidaying Meredith Vieira as host on the morning TV show Today.
In January 2006, a new season of So You Think You Can Dance started its auditions, with Deeley in the role of host. In 2011, Deeley was nominated for a Primetime Emmy Award for Outstanding Host for a Reality or Reality-Competition Programme.
Other projects of Deeley's include presenting the third season of Soundtrack to My Life and playing herself as host of comedian Peter Kay's Britain's Got the Pop Factor.
In 2012, Cat presented the launch show for ITV's Soccer Aid appeal on the Friday before the Soccer Aid match.She is married to Northern Irish comedian and television personality Patrick Kielty. She left full-time modelling in 1997, following changes in her contract with Storm.She moved on to co-present the MTV chart show, Hitlist UK, with close friend Edith Bowman.In June 2011, Deeley launched her own "behind-the-scenes" web series called In The Dressing Room with Cat Deeley, produced by Deeley, Yahoo! On 18 August 2011, she appeared on Live with Regis and Kelly, as a fill-in for Kelly.On 26 January 2012 she again co-hosted Live with Regis and Kelly with Kelly Ripa.