Alyson Leigh Rosenfeld was born on March 21, 1987 in New York City. She graduated from New York University.
Rosenfeld played Manicka in The Last Cyclist, an absurdist comedy about the Holocaust, between May 30 and June 9, 2013 at the West End Theatre.
Between March 7 and 29, 2015, Rosenfeld starred as the titular role in Stephen Schwartz's first professional NYC production of The Baker's Wife at The Gallery Players.
Rosenfeld starred as Gertrude in Lynn Ahrens & Stephen Flaherty's Seussical at The Gallery Players from January 29 until February 21, 2016.
Between January 28 and February 19, 2017, Rosenfeld starred in Stephen Sondheim's Marry Me a Little and as Lucy in You're A Good Man, Charlie Brown. Both shows were performed in rep.
Between January 27 and February 18, 2018, Rosenfeld performed in William Finn's A New Brain as Rhoda.
Rosenfeld starred as Princess Winnifred in Mary Rodgers' Once Upon a Mattress between February 22 and March 17, 2019.
- Insiders (2021-present) - Additional Voices
- Kikoriki (2004-2012) - Rosa (FUN Union Dub)
- Winx Club (2004-present) - Musa (eps. 183-208), Miele, Elena, Additional Voices
- Spike Team (2010-2014) - Jo
- Super 4 (2014-2017) - Princess Leonora, Baba Cara, Fairy Queen
- Kid-E-Cats (2015-present) - Smudge
- Lastman (2016) - Siri, Additional Voices
- 44 Cats (2018-present) - Lola, Neko, Fleur
- Bread Barbershop (2020-present) - Additional Voices
- Birdboy: The Forgotten Children (2015) - Psychopaths, Additional Voices
- Sheep & Wolves (2016) - Xavi, Additional Voices
- The Snow Queen 3: Fire and Ice (2016) - Troll Kids
- Fantastic Journey to Oz (2017) - Dorothy
- Fantastic Return to Oz (2019) - Dorothy
- Mobile Suit Gundam SEED Destiny (2004-2005) - Lunamaria Hawke (NYAV Post Dub)
- Pokémon Diamond & Pearl (2006-2010) - Jasmine (ep. 180)
- Pokémon Best Wishes! (2010-2013) - Nurse Joy, Ada (ep. 12), Mimi (ep. 35), Deino's Trainer #A (ep. 56), Mick (ep. 65), Roxie (eps. 83-84), Trainer in Green Shirt (ep. 83), Woman (ep. 124), Azumarill's Trainer (ep. 129), Female Darumaka Trainer (ep. 129), Additional Voices
- Yu-Gi-Oh! Zexal (2011-2014) - Rio Kastle / Marin, Additional Voices
- Pokémon XY (2013-2016) - Bonnie, Boy #A (ep18), Girl #A (ep18), Kathi Lee (eps. 28, 117), Staff Woman (ep. 47), Clemont's Diggersby (ep. 98), Village Boy Child (ep. 100), Village Crowd (ep. 100), Female Reporter (ep. 112), Additional Voices
- Yu-Gi-Oh! Arc-V (2014-2017) - Allie, Riley Akaba, Gloria Tyler, Grace Tyler, Amanda
- Pokémon Sun & Moon (2016-2019) - Sophocles, Lillie's Maid (ep. 8), Additional Voices
- Snack World (2017-2018) - Additional Voices
- Pokémon Journeys: The Series (2019-present) - Bea's Rotom Phone, Hibana (eps. 7, 38), Boy with Brown Hair (ep. 20), Sophocles (ep. 37), Eva (ep. 42), Pikipek's Trainer (ep. 47), Pinery (ep. 49), Additional Voices
- Maesetsu! Opening Act (2020) - Eru Kusaba, Additional Voices
- Kageki Shoujo!! (2021) - Additional Voices
OVAs & Specials
- Mobile Suit Gundam: The Origin (2015-2018) - Fraw Bow
- Pokémon: Zoroark: Master of Illusions (2010) - Peg, Additional Voices
- Pokémon the Movie: Black/White - Victini & Reshiram/Zekrom (2011) - Additional Voices
- Pokémon the Movie: Kyurem vs. the Sword of Justice (2012) - Nurse Joy, Additional Voices
- Pokémon the Movie: Genesect & the Legend Awakened (2013) - Nurse Joy, Additional Voices
- Pokémon the Movie: Diancie & the Cocoon of Destruction (2014) - Bonnie, Additional Voices
- Pokémon the Movie: Hoopa & the Clash of Ages (2015) - Bonnie, Additional Voices
- Pokémon the Movie: Volcanion & the Mechanical Marvel (2016) - Bonnie, Additional Voices
- Your Name (2016) - Additional Voices
- Yu-Gi-Oh! The Dark Side of Dimensions (2016) - Little Girl, School Girl, Tourist Woman, Additional Voices
- Lu Over the Wall (2017) - Isaki, Wangyo
- Liz & the Blue Bird (2018) - Hazuki Kato
- Mazinger Z: Infinity (2018) - Sayaka Yumi
- Pokémon The Movie: The Power of Us (2018) - Nurse Joy, Female Trainer with Ponytail, Girl with Blonde Hair, Little Girl, Additional Voices
- Mewtwo Strikes Back Evolution (2019) - Nurse Joy
- Promare (2019) - Aina Ardebit, Additional Voices
Video Game Dubbing
- Yu-Gi-Oh! Duel Links (2016) - Yubel, Rio Kastle, Mickey, Additional Voices
- Earth Defense Force: Iron Rain (2019) - Tatiana
- Snack World: The Dungeon Crawl - Gold (2019) - Additional Voices
- Yu-Gi-Oh! Rush Duel: Dawn Of The Battle Royale (2021) - Female Drone, Additional Voices