How many musicians could get a half dozen luminaries to appear in their biopic disguised as animated LEGO figures?

As is obvious by the celebrity roster in “Piece by Piece,” only Pharrell Williams could have enticed Gwen Stefani, Kendrick Lamar, Timbaland, Justin Timberlake, Busta Rhymes, Jay-Z and Snoop Dogg to voice LEGO versions of themselves in this autobiographical journey.

It happened because Williams, 51, who may be among the most influential producers of all time for his innovations with rap, R&B and pop, is also a changed man since he turned 40.

When a biopic was first proposed, he passed.

“I did not find my story particularly interesting. Nor did I want to hear me. That’s what I had on my mind,” he said during a virtual press conference. “But people said. ‘But you’re an entertainer.’

“I always felt that way about my voice. I just do what I do for other people and every so often I have a song for myself. I don’t watch my videos, I don’t listen to myself.

“Most entertainers have enough vanity where they can do what they do but my objectivity is different — because I’m producer and have a high standard how performance should be, and it can be debilitating to me. So I said I didn’t want to do it.

“Then, my agent (who was incredibly persistent) said the magic words, ‘You can do it anyway you want it.’”

Williams enlisted “A master storyteller” in Morgan Neville, an Oscar winner for Best Documentary Feature for “20 Feel from Stardom” (about backup singers) and a hitmaker with his Mr. Rogers biopic, “Won’t You Be My Neighbor?”

“You see how he can tell someone’s story in a beautiful way,” Williams said. “So I let him choose the songs and how he wanted to use them. But I wanted the story told thru the filter of the LEGO world (because) I wanted my kids” – he has four – “to understand my story. Because we always buy the kids LEGO sets and that’s what I played with as a child.”

“It’s interesting,” Neville said. “Pharrell talks about using LEGO to hide a little bit better. I actually feel LEGO got us closer. Suddenly, we can get in his head and see all the beats and do all these things you can’t do in a documentary. It opened a door to the possible, to get more of the creativity but also in a way be more intimate.

“I didn’t know,” he confessed, “if it would work at the beginning. But when the gears are working well together, and every step of the way when we tried something, it was, ‘That’s great!’

“Piece by Piece” opens in theaters Oct. 11

The LEGO character voiced by Snoop Dogg in a scene from “Piece By Piece.” (Focus Features via AP)