Bow Wow, David Henrie, Victoria Justice and Shailene Woodley will join Justin Bieber as honorees at Variety’s fourth annual Power of Youth event presented by The Hub on Oct. 24.

The four young entertainers were chosen to receive Variety’s Power of Youth Philanthropy Award because of significant contributions they’ve made to philanthropic and charitable causes. The guest list for the event, taking place at Paramount Studios, is comprised of 750 notable actors and recording artists, all under 25, along with families and children who have been helped by the honorees’ charitable causes.

“Variety’s Power of Youth campaign has become a catalyst for philanthropic involvement,” said Brian Gott, publisher of Variety. “This effort is a celebration of what is one of the most generous and charitable industries on the planet.”

The honorees’ charities are Pencils of Promise (Bieber), Education Through Music — Los Angeles (Bow Wow), LA’s BEST (Henrie), Girl Up (Justice) and All It Takes… (Woodley).

Margaret Loesch, president and CEO of The Hub, said the event syncs with the “DNA of The Hub” to encourage youth to incorporate service into their lives.

The event’s annual online fund-raising auction will kick off Oct. 19 with bid items ranging from lunch with “Twilight” star Kellan Lutz to a five-night stay at the Four Seasons Resort, Maui.

Separately, there will be an online donation widget (Variety.com/poy) where fans can enter to win four tickets to the invite-only event.