Rachel Riley has taken to Twitter to share some sad news regarding the Countdown family with her fans.The 35-year-old, who fronts the Channel 4 daytime show, revealed that Marcel Stellman - the creator of Countdown - has passed away at the age of 96.READ: Pasha Kovalev shares fears for pregnant wife Rachel Riley over online trollingWATCH: Rachel Riley's daughter makes Countdown debut"Sad news at the loss of the man who brought Countdown to the UK," she tweeted alongside Marcel's family