Sterling Knight (born March 5, 1989) is an American actor and musician. He is best known for playing the roles as Alex in "17 Again", Chad Dylan Cooper in Disney Channel Original Series "Sonny with a Chance" and its spinoff "So Random!", Zander Carlson in "Melissa & Joey", and Christopher Wilde in the Disney Channel Original Movie "Starstruck".
Can we infer the following?
Sterling Knight knew the actor who played Sonny on "Sonny with a Chance".
It's impossible to say