Cowper is the younger sister of twin actresses Jackie Cowper and
Gerry Cowper, the latter being most famous for playing
Rosie Miller in BBC's
EastEnders — though the Cowper sisters did not appear in the serial at the same time. Cowper was in a long-term relationship with Tony McCann, a convicted armed robber who served a 15-year jail sentence for holding up a
Lloyds Bank and stealing £9,000 in 1988. Cowper's elder sister, Gerry, fell in love with and married McCann's accomplice in the robbery, Mark Foley, though they have since separated. Cowper and McCann have twin daughters (but not identical), Dora and Tilly, born in 1999, and they live in
Twickenham, south-west London. In April 2008 McCann was found guilty of murdering a 33-year-old man and sentenced to a minimum of 21 years imprisonment. Tony McCann died in prison of liver and kidney cancer on 19 October 2020. ==References and notes==