Tom Kenny found it “hilarious” when people thought he was dating Ariana Grande. The 62-year-old voice actor has played the titular role of the cartoon character in ‘SpongeBob SquarePants’ since 1999 but when pop megastar Ariana, 31, struck up a relationship with Ethan Slater at a time when he was starring in the Broadway musical adaptation of the Nickelodeon series, it led to some confusion amongst fans. He told E! News: “That was hilarious. It said ‘SpongeBob actor dating Ariana Grande.’ And people were like, ‘Wow, Tom Kenny, he’s a player’.” The former ‘Futurama’ actor – who is married to Ji…