Russell Crowe's bio-doc meets concert film What Love Builds premiered Out of Competition at the Venice Film Festival on Friday evening, delighting a 1,400-strong crowd with its candid exploration of his lifelong musical journey.

The documentary aims to illustrate that music has been a fundamental part of Crowe's life long before his late-1980s move from New Zealand to Sydney to pursue acting, where he initially busked on the streets. It meticulously charts his early musical endeavors, from his teenage performances as Russ Le Roq in an Auckland music hall to his impressive 415 appearances as Eddie/Dr Scott in a New Zealand production of The Rocky Horror Show.

Crowe delves into the formation of his first major band, 30 Odd Foot of Grunts, in 1992, and its prophetic The Photograph Kills EP. He discusses his abrupt decision to disband the group as his acting career skyrocketed, feeling his burgeoning fame was compromising their artistic integrity. A particularly aggressive, almost "vampiric," offer from then-Sony head Tommy Mottola to sign the band proved to be the final straw.

The film also highlights the profound influence music has had on his acting. Crowe reveals that a line from his iconic character Maximus in Gladiator, where he tells Emperor Marcus Aurelius he's been away for "2 years, 264 days, and this morning," was written at his request, inspired by Prince's "It’s been seven hours and 15 days" lyric from Nothing Compares 2 U. Later, during the 2010 production of Robin Hood, he recounts influencing the casting of the Merry Men to include actors who were also musicians, such as Scott Grimes, who would eventually become an occasional member of Crowe's current band, Indoor Garden Party, alongside talents like Les Misérables actress Samantha Barks and Canadian folk-rock musician Alan Doyle.

"What Love Builds" doesn't shy away from the more challenging aspects of his career. Crowe addresses lows such as his 2005 arrest in New York for assault, the "pain" of relentless paparazzi pursuit (though he ironically expresses gratitude for some of the candid photos they captured with his children), and the public ridicule his work as a musician and songwriter often faced as his acting fame soared.

Live performance footage interspersed throughout the film resonated deeply with the Venice audience, who clapped along as if at a concert. A cover version by Crowe of Dire Straits’ Romeo and Juliet reportedly caused the Sala Darsena theater to erupt into full-scale applause. As the credits rolled, spectators continued to clap to the beat of the final track, with a visibly happy Crowe laughing and smiling at the overwhelmingly positive reaction.

Russell Crowe breaks into huge smile as 1,400-strong crowd claps to the beat of closing credits of bio-doc come concert film ‘What Love Builds’ at Venice Film Festival

Crowe, who not only stars but also wrote, directed, and produced the documentary, shared in a press conference that the project was 15 years in the making. "I thought it might take me a year, but as I was doing it, things would come up that I was going to be doing shortly with the music, so I kept waiting for that, and the next thing, and the next thing. By the time we sat down to cut it we had an extensive 18 feet of film," he explained. His core intention was to answer the frequently asked question about the difference between music and acting, concluding that for him, "the two things are completely intertwined."

Venice had always been Crowe's target festival for the documentary. He revealed he contacted Italian director Gabriele Muccino, who directed him in Fathers & Daughters, to help connect him with Artistic Director Alberto Barbera. "The most amazing thing would be if I could get to screen this in Venice," he recalled thinking. "I’ve been to a lot of film festivals, but the most fun film festival is Venice, and there’s depth in the appreciation of the audience. I couldn’t have had a better result as a filmmaker. This thing was just extremely personal, and this is the absolute perfect place."