Barbra Streisand and Kris Kristofferson reunite for 'A Star Is Born' duet

Barbra Streisand fans rejoice!

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The music icon reunited with Kris Kristofferson to perform "Lost Inside of You" from the 1976 film, "A Star is Born."

Performing together during "British Summer Time" at London's Hyde Park over the weekend, fans went absolutely wild.

A reunion 43 years in the making, Streisand, 77, seemed overjoyed to share the stage with Kristofferson, 83, describing him to the audience as “one of my favorite leading men."

Streisand first teased something in the works back in April, but gave no detail as to where or when, until now.

Their chemistry, palpable as ever, had us most definitely lost in their music and lost in their eyes.