Tim Allen sought help from a voice coach after being told his Buzz Lightyear sounded "old" when he started working on Toy Story 5.
The 73-year-old actor - who was 42 when the first film in the franchise opened - admitted he "didn't know how to take" the notes he received after his first recording session, but learned the importance of warming up his voice.
"Early on when we did this first radio plug for this one, T5, in a nice way some of the engineers were going, 'Buzz sounds a little old,' and I didn't know how to take that," he told Entertainment Weekly.
"So I got together with a voice coach from New York City Opera [that] they put me with. She said, 'You're not old. Don't get that in your head. You do have to warm up at your age. You can't just get right into [it].'"