A spokesperson for Zimmer confirmed he had proposed to his partner, whose name and age were not provided.
Zimmer’s fans were treated to an array of music he has composed for hit films over the past few decades, including Gladiator, The Dark Knight and Inception.
He was joined onstage by his band as well as the Ukrainian Odessa Orchestra, to whom he paid a special tribute.
“I think it takes enormous courage to sit here, smile at you, play without flaw for three hours while you do not know what’s going on at home and everything is going on at home,” said Zimmer.
The musician, who has been married twice before, has been nominated for 12 Academy Awards, winning two — for best score for the 1994 Disney film The Lion King and the 2021 sci-fi blockbuster Dune. Both featured in the show.