renee zellPhoto: Evan Agostini/Invision/AP

The upcoming Renee Zellweger-starring biopic about the later life of film legend Judy Garland hits theaters on September 27.

On Tuesday, Zellweger and Sam Smith unveiled their new duet of the Harold Arlen and Ted Koehler classic ‘Get Happy’, most famously performed by Garland herself.

Complete with a big brass band, and Zellweger offering up an evocation of the late icon, the song gleams with pure joy, thanks in no small part to Smith's inclusion.

Taking place in the final years of the iconic singer's life, Judy follows Garland's five-week residency at London's Talk of the Town as she continues to find conflict with her management team, reunite with old friends and even begin a relationship with her soon-to-be fifth husband Mickey Deans.