Good question! So, I did a little research for you, and he certainly looks like Alan Thicke. Then, I found this little tidbit:
FUN FACT: Does the last name THICKE sound familar? Well, that's because Robin is actually the son of Alan Thicke, famed dad from the '80s sitcom "Growing Pains". Robin gets his music abilities from his dad, who's penned several '80's sitcoms theme songs. Just keeping you music fans on your toes.