During the summers off from college, Leung earned his Equity Card performing at the Pittsburgh Civic Light Opera and The MUNY in St. Louis.
He worked with directors and choreographers including Tony Award winner Thommie Walsh, Larry Fuller, and Lee Roy Reams.
It was also at CMU that he met fellow Broadway performer Billy Porter, who returned to his alma mater to direct the main stage production of Stephen Sondheim's Company.
After casting Leung as Bobby in Company, Porter telephoned colleagues involved in the Broadway revival of Flower Drum Song and landed Leung an audition.

In the fall of 2002, Leung made his Broadway debut in the revival of Flower Drum Song, starring Lea Salonga, as a member of the ensemble and an understudy for Wang Ta.
He later worked on Broadway with Sondheim in Roundabout Theatre's revival of Pacific Overtures in 2005.
After Pacific Overtures, Leung originated the role of Boq in the Chicago company of the Stephen Schwartz musical Wicked.
He moved back to New York in 2006 to take part in the Paper Mill Playhouse production of Godspell.
He then returned to Broadway and performed as an ensemble member in the final run of Rent.

In 2007, he guest starred in an episode of Law & Order: Criminal Intent.
Leung was a member of the final company of Rent – and made his film debut as part of the ensemble in Rent: Filmed Live on Broadway.
He had a recurring role in the musical comedy-drama series Glee from 2010 to 2011, portraying the role of Wes, a member of the Dalton Academy Warblers.

Leung appeared in the Broadway revival of Godspell at the Circle in the Square Theatre.
He reprised his role from the Paper Mill production as the "All Good Gifts" soloist.
He was a featured performer in the world premiere of the musical Allegiance at the Old Globe Theatre in San Diego.
The production premiered in September 2012, with Lea Salonga and George Takei also in the cast.
In 2014, Leung appeared in the play The World of Extreme Happiness at Goodman Theatre in Chicago.
He went on to star in the co-production at the Manhattan Theatre Club in February 2015.

In October 2015, Leung returned to Broadway in the musical Allegiance at the Longacre Theatre alongside co-stars George Takei and Lea Salonga.
He then went on to perform in the acapella musical In Transit.
Leung is currently playing the titular character of the Broadway production of Aladdin, having started his run on June 13, 2017.
During the summers off from college, Leung earned his Equity Card performing at the Pittsburgh Civic Light Opera and The MUNY in St. Louis. He worked with directors and choreographers including Tony Award winner Thommie Walsh, Larry Fuller, and Lee Roy Reams. It was also at CMU that he met fellow Broadway performer Billy Porter, who returned to his alma mater to direct the main stage production of Stephen Sondheim's Company. After casting Leung as Bobby in Company, Porter telephoned colleagues involved in the Broadway revival of Flower Drum Song and landed Leung an audition.
In the fall of 2002, Leung made his Broadway debut in the revival of Flower Drum Song, starring Lea Salonga, as a member of the ensemble and an understudy for Wang Ta. He later worked on Broadway with Sondheim in Roundabout Theatre's revival of Pacific Overtures in 2005. After Pacific Overtures, Leung originated the role of Boq in the Chicago company of the Stephen Schwartz musical Wicked. He moved back to New York in 2006 to take part in the Paper Mill Playhouse production of Godspell. He then returned to Broadway and performed as an ensemble member in the final run of Rent.
In 2007, he guest starred in an episode of Law & Order: Criminal Intent. Leung was a member of the final company of Rent – and made his film debut as part of the ensemble in Rent: Filmed Live on Broadway. He had a recurring role in the musical comedy-drama series Glee from 2010 to 2011, portraying the role of Wes, a member of the Dalton Academy Warblers.
Leung appeared in the Broadway revival of Godspell at the Circle in the Square Theatre. He reprised his role from the Paper Mill production as the "All Good Gifts" soloist. He was a featured performer in the world premiere of the musical Allegiance at the Old Globe Theatre in San Diego. The production premiered in September 2012, with Lea Salonga and George Takei also in the cast. In 2014, Leung appeared in the play The World of Extreme Happiness at Goodman Theatre in Chicago. He went on to star in the co-production at the Manhattan Theatre Club in February 2015.
In October 2015, Leung returned to Broadway in the musical Allegiance at the Longacre Theatre alongside co-stars George Takei and Lea Salonga. He then went on to perform in the acapella musical In Transit. Leung is currently playing the titular character of the Broadway production of Aladdin, having started his run on June 13, 2017.
Telly Leung