The pair were filmed sharing a joke after Manchester United’s friendly win over Real Madrid yesterday.
Mourinho shook hands with the forward and whispered something in his ear.
In video footage the Portuguese says: “I can't buy you because you don't talk to me.”
Earlier Mourinho had ruled out a move for Bale as mission impossible.
He said: “The same [as Ronaldo].
“You have contacts and feelings, you understand things, and it was clear that Bale likes Madrid, the challenge and situation.
“They are in a very good situation now and I never felt a desire for him to leave, so why waste time on it? No.”
United have been linked with Bale for a number of years and they first tried to sign him back in 2013.
But Bale opted to join Real Madrid instead of United when he left Spurs for a world-record £86m.