Episode 15: Rhys James, Cally Beaton, Mark Billingham

Rhys James, Cally Beaton, Mark Billingham join Richard Osman to guess the ages of celebrities born between 9th-15th December.
This week, will Cally get into the other players heads again? Do you know how old your mum is? But most importantly, can YOU beat the scores of the players in the studio?
For more information on this weeks' guests, they are on Twitter as: @rhysjamesy @callybeaton @billingham229b