Thomas Grant Gustin (born January 14, 1990), better known as Grant Gustin, is an American theater and television actor from Norfolk, Virginia.

During his high school years, Grant attended the Governor’s School for the Arts program in Norfolk, Virginia for Musical Theatre. He also went to Hurrah Players Incorporated which is a theatre organization in Virginia. In 2008, he graduated from Granby High School and went on to attend the BFA Music Theatre Program at Elon University in North Carolina for two years.

He left school to take the role of Baby John in the Broadway Revival Tour of West Side Story, and performed with the tour from its opening on September 30, 2010 through September 23, 2011.

On November 8, 2011, he debuted on the television series Glee as Sebastian Smythe, an openly gay member of the Dalton Academy Warblers. Gustin won the recurring role of Sebastian, a promiscuous and scheming character, after “an exhaustive, weeks-long casting search”. He originally auditioned for a role as a tap dancer, but did not get the part. However, Ryan Murphy kept him in mind. He began filming the role early on Monday, September 26, 2011, after having finished his final West Side Story performance the Friday night before.

Gustin began filming A Mother’s Nightmare, a telefilm for the Lifetime network, in late May 2012. The project also stars actresses Annabeth Gish and Jessica Lowndes, and was shot in Canada. On July 11, 2012, it was announced that Gustin landed the lead role in the indie film, Affluenza.

On September 13, 2013, Gustin was announced to be appearing as Barry Allen in season 2 of Arrow. Initially he was to appear in three episodes, with the last one acting as a backdoor pilot for a proposed Flash series. However, the backdoor pilot plan was dropped in favor of a separate Flash pilot, which will be a spin-off of Arrow