Westwood founder Louis Castle is to keynote Develop in Brighton this year.
David Helgason, CEO of Unity Technologies, will also be a main speaker. Helgaston and Castle, now head of Instant Action, will perform the opening and closing keynotes.
"I have recently been attempting to free the games industry from the shackles of bricks and mortar and democratizing music games in the process," said Castle.
"It's been an exciting and challenging time and I'm really looking forward to sharing my experiences at Evolve."
Helgason added: "I'm looking forward to coming to Evolve and sharing some of the discoveries we've made with Unity. I'll be talking about how games are everywhere and, more importantly, how we can use them to conquer untapped markets.
"I'm not just talking about fun. Fun is overrated!"
Develop takes place in Brighton between July 13-15.