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Declan Docherty is the youngest and second son of Steven and the other stepson of Kerry . He has an older half-brother named Ryan (aged 9) and an identical twin brother named David (aged 3).

He swears a lot and sometimes gets aggressive with David. Before Ryan goes on rampage, Declan suddenly fell down the stairs that made him screams in pain.

He was 3 years old when he appeared on Supernanny and is now 13 in 2016.