Donnelly dated actress Clare Buckfield for ten years between 1993 and 2003, and television presenter Georgie Thompson from January 2009 until April 2011. On 13 November 2014, Donnelly became engaged to the duo's manager Ali Astall, with whom he had been in a relationship for over a year, with the marriage taking place at St Michael's Roman Catholic Church, Elswick, Tyne and Wear, on 1 August 2015. The ceremony was conducted by his brother, Father Dermott Donnelly, a Catholic priest, with McPartlin as his best man.
Declan Donnelly has a net worth of $40 million dollars. Donnelly was born in Newcastle upon Tyne, England in September 1975, the youngest of seven children. Dec and Ant also own a production company called Mitre Television. Dec also starred in the films Love Actually and Alien Autopsy. Ant & Dec signed a $30 million pound contract with ITV in 2007. They donated money from their single "Let's Get Ready to Rhumble" to the charity ChildLine. In 2013 the pair opened the W4 Youth Centre. Donnelly has won British Comedy Awards, National Television Awards (UK), Royal Television Society awards (UK), Television and Radio Industries Club Awards, and a TV Quick Award (UK).