More change is afoot in Los Angeles’ high-end luxury real estate business, which has seen a wave of new brokerages join the scene in the past two years and a surprising number of power-seller agents switch their allegiances.

Now, two of L.A.’s biggest celebrity real estate agents, James Harris and David Parnes of Bond Street Partners — known for starring on Bravo’s Million Dollar Listing Los Angeles for seven seasons before leaving the real estate reality series in 2022 — are on the move.

The duo — who have repped stars such as Rihanna, Carey Mulligan, Demi Lovato, Big Sean and Kevin Durant (according to public records) — are joining Carolwood Estates, the nearly 2-year-old agency founded in 2022 by Drew Fenton, Nick Segal and Ed Leyson.

Harris and Parnes, who in a typical year do $500 million to $600 million in residential real estate sales, have long made a home at The Agency (co-founded by Mauricio Umansky,...