“They sang me this song – Guillermo can you help me out? – they sang me this song, the Mexican fans. I put the sombrero on and they all started singing,” he said, noting the song was called “El Cielito Lindo.”
Guillermo explained it means “the night sky” and offered to sing the tune with Hiddleston.
Guillermo then attempted to help Hiddleston out, teaching him the lyrics, which the actor feebly tried out. After the singing flopped, Hiddleston continued to work on his Spanish, telling Guillermo in Spanish that he hadn’t forgotten about the gorilla suit from the last time he visited.
“You’re very gorilla-themed in general,” Kimmel quipped. “Is King Kong a gorilla or an ape?”
MORE: 'Kong: Skull Island' Review: You Want Giant Monsters? You'll Get Your Giant Monsters
“I don’t know that, actually,” Hiddleston admitted. “I feel like he’s an ape. People say he’s an ape. I called him a monkey once and it didn’t go down well on Twitter.”
For more from Hiddleston, watch the clip below!