Patsy is joined on stage by the duo for her performance of 'Dream A Little Dream', but can barely keep her hands off Dec and receives a hug from a smitten Ant.
Whether Patsy impresses the judges as much as the hosts remains to be seen.
Elsewhere on Saturday's show, Kieran Lai wows the judges with his body popping routine based on The Tin Man from The Wizard of Oz.
The 17-year-old leaves the judges agape as Simon Cowell appears baffled by Lai's surprisingly flexible limbs.
ITV has also released a preview of swing band Jack Pack, who attempt to make it through to the next round by performing 'That's Life'.
David Walliams certainly seems to enjoy the song as he nods along, but again it won't be known if they make it through until Saturday night.
Britain's Got Talent airs on Saturday at 7.15pm on ITV.