Tannis Kathleen Vallely (December 28, 1975 in New York City) is an American casting director and former child actor. She played Janice Lazzarotto on the ABC sitcom Head of the Class and Mary on 3-2-1 Contact. She was a casting associate for X-Men Origins: Wolverine (2009) and Total Recall (2012) and casting director for 1600 Penn (2012-13) and Siren (2018-20).
Vallely graduated from Stanford University in 1997 with a psychology degree. She is the daughter of actress Myra Turley and producer/screenwriter Jim Vallely; Her uncle is writer and illustrator Bill Vallely. She married Jeremy Kromberg in 2004.
- Class Is in Session! Snakkle Catches Up with the Cast of Head of the Class, at Snakkle; by Elizabeth Perkins; published September 15, 2011; retrieved September 15, 2011
- "Tannis Vallely". IMDb. Retrieved 2020-12-05.
- Exclusive interview with Elisabeth Moss: Don't play subtext at LippSisters; by Deborah Lipp; published October 5, 2009; retrieved May 5, 2013
- TCA Press Tour, Summer 2010: Day 7 at Premium Hollywood; by Will Harris; published August 7, 2010; retrieved May 5, 2013