The duo, who finally confirmed their relationship last week after months of speculation, were seen getting "a bit emotional" in the lobby of a London hotel in the early hours of Monday (March 11) morning.
In paparazzi photos, Ghadie can be seen in a tearful state with Longchambon holding on to her arm.
The Coronation Street actress then appears to storm away from him and starts gesturing angrily in other pictures captured following a night of partying.
A spokesperson for Ghadie told the Daily Mail: "After numerous drinks at the Dancing on Ice wrap party, there was some confusion about a hotel room and Samia got a bit emotional before it was quickly resolved.
"Samia was being consoled by Sylvain and a few other friends. We have all been there after a drink or too, luckily we don't all have our photos taken."
Ghadie felt the urge to vent on Twitter in the wake of the incident, writing yesterday (March 13): "Some people seem to put others down or judge them to make themselves feel better, I don't understand that mentality in this country #noneed."
The couple were heavily scrutinised throughout Dancing on Ice following the furore over Longchambon's split with Hollyoaks actress Jennifer Metcalfe.
Dancing on Ice 2013 Final in pictures:
Copyright: Matt Frost/ITV/Rex Features