The actor, who played half-giant Hagrid in all eight Harry Potter film adaptations, was scheduled to appear at Universal’s Celebration of Harry Potter event in Orlando beginning on Friday, but fell ill on the flight to Florida.
"Robbie took ill last night and is getting the rest he needs to feel better," said Universal Orlando in a statement. "We are sorry he can’t be with us this weekend, but we look forward to seeing him up and better soon."
According to TMZ, the actor was traveling with Harry Potter co-star Michael Gambon, who played Albus Dumbledore in several of the films.
Coltrane's co-star Tom Felton recently made a shocking announcement after taking the Sorting Hat quiz on the Pottermore website. Find out if Felton was sorted into Slytherin like his character Draco Malfoy in the video below.