January[]
| Person | Characters portrayed / job titles | Birthdate |
|---|---|---|
| Danica McKellar | Veronica | January 3, 1975 |
| Greg Cipes | Mort Schaeffer | January 4, 1980 |
| Brett Dalton | Brick | January 7, 1983 |
| Jemaine Clement | Orton Mahlson | January 10, 1974 |
| Maulik Pancholy | Neal | January 18, 1974 |
| Philip "Phil" LaMarr | Marcus Underwood | January 24, 1967 |
February[]
| Person | Characters portrayed / job titles | Birthdate |
|---|---|---|
March[]
| Person | Characters portrayed / job titles | Birthdate |
|---|---|---|
| Laraine Newman | Ms. White | March 2, 1952 |
| Vanessa Williams | Eileen Underwood | March 18, 1963 |
| Kate Micucci | Sara Murphy | March 31, 1980 |
April[]
| Person | Characters portrayed / job titles | Birthdate |
|---|---|---|
| Chrissie Fit | Amanda Lopez | April 3, 1984 |
| Django Marsh | Chad, Additional Voices | April 15, 2001 |
| Adrian Pasdar | Mr. Chase | April 30, 1965 |
May[]
| Person | Characters portrayed / job titles | Birthdate |
|---|---|---|
| Sabrina Carpenter | Melissa Chase | May 11, 1999 |
June[]
| Person | Characters portrayed / job titles | Birthdate |
|---|---|---|
July[]
| Person | Characters portrayed / job titles | Birthdate |
|---|---|---|
| Pamela Adlon | Brigette Murphy | July 9, 1966 |
August[]
| Person | Characters portrayed / job titles | Birthdate |
|---|---|---|
| Sophie Winkleman | Time Ape | August 5, 1980 |
| Christian Slater | Elliot Decker | August 18, 1969 |
| Sarah Chalke | Ms. Murawski | August 27, 1976 |
| Dee Bradley Baker | Diogee | August 31, 1962 |
September[]
| Person | Characters portrayed / job titles | Birthdate |
|---|---|---|
| Dan Povenmire | Vinnie Dakota and Heinz Doofenshmirtz/co-creator of Phineas and Ferb and Milo Murphy's Law | September 18, 1963 |
| Mark Hamill | Mr. Block | September 25, 1951 |
October[]
| Person | Characters portrayed / job titles | Birthdate |
|---|---|---|
| Mekai Curtis | Zack Underwood | October 14, 2000 |
| "Weird Al" Yankovic | Milo Murphy | October 23, 1959 |
| Vincent Martella | Bradley Nicholson and Phineas Flynn | October 15, 1992 |
| Kevin Michael Richardson | Nolan Mitchell, Corporal Wolinsky, Additional Voices | October 25, 1964 |
November[]
| Person | Characters portrayed / job titles | Birthdate |
|---|---|---|
| Mackenzie Phillips | Principal Elizabeth Milder | November 10, 1959 |
| Ming-Na Wen | Savannah | November 20, 1963 |
December[]
| Person | Characters portrayed / job titles | Birthdate |
|---|---|---|
| Jeff "Swampy" Marsh | Balthazar Cavendish and co-creator of Phineas and Ferb and Milo Murphy's Law | December 9, 1960 |
| Diedrich Bader | Martin Murphy | December 24, 1966 |