List of Phineas and Ferb guest stars

This is a list of guest stars who have appeared on the Disney animated musical comedy television series, Phineas and Ferb. Per Academy of Television Arts & Sciences guidelines, individuals appearing in more than half of a given season's episodes will be considered "recurring" and will not be included on the list.

Films
The following appeared as guest stars in Phineas and Ferb the Movie: Across the 2nd Dimension.

The following appeared as guest stars in Phineas and Ferb the Movie: Candace Against the Universe.