Grant Gustin

Gustin's first known screen role came while he was still in high school in the film Rain (2004). In this student film, by director/producer Neil Grochmal, during his studies at Regent University. Gustin plays a young mute who dreams of a man's tragic loss of his wife in a robbery, then later crosses paths with the man, stirring visions that help the man solve the mystery of who murdered his wife. Grochmal said Gustin showed raw talent and figured the youngster would be a future achiever in acting.

In 2010, Gustin 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 background 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 previous Friday night. In January 2012, Naya Rivera (as her character Santana Lopez) and Gustin (as Smythe) performed "Smooth Criminal" as a duet in the season three episode "Michael", backed by musical duo 2Cellos. The song was filmed in a similar environment as the 2Cellos music video, in a room surrounded by empty chairs as the two musicians play. This cover debuted and peaked at number 26 at Billboard Hot 100, number 10 at Billboard Digital Songs, and number 28 at Billboard Canadian Hot 100 chart at the week of February 18, 2012.

In 2012, Gustin began filming A Mother's Nightmare, an original film for the Lifetime network, in late May. The project also stars actresses Annabeth Gish and Jessica Lowndes, and was shot in West Kelowna, British Columbia, Canada. On July 11, 2012, it was announced that Gustin had landed a major role in the independent film Affluenza.

On September 13, 2013, it was announced that Gustin would play Barry Allen in the second season of Arrow. He was initially supposed to appear in three episodes, the last one serving as the backdoor pilot for a potential spin-off Flash series. However, the backdoor pilot plan was dropped in favor of a standalone pilot, titled The Flash. The pilot was picked up with an initial order of thirteen episodes, and the series premiered on October 7, 2014, with 4.8 million viewers, the most for a premiere on The CW in five years. With 184 episodes aired across nine seasons in total, The Flash concluded on May 24, 2023. As part of the greater Arrowverse, Gustin reprised his role as Allen on Arrow, Supergirl and Legends of Tomorrow, as well as the web series Vixen.

On March 30, 2016, it was announced that Gustin would star in William H. Macy's film Krystal. The film premiered in 2017 at the Virginia Film Festival, and was released on April 13, 2018, by Great Point Media and Paladin In March 2020, Gustin was cast in Operation Blue Eyes as Barry Keenan.