8 of the best and worst looks seen on the 2026 Breakthrough Prize red carpet

Sam Altman and Oliver Mulherin at the 2026 Breakthrough Prize ceremony in Santa Monica.

Gonzalo Marroquin/Getty Images

• The Breakthrough Prize ceremony was hosted in Santa Monica on Saturday night.
• A mix of actors, musicians, and billionaires attended and walked the red carpet.
• Robert Downey Jr. was one of the best-dressed, while Christina Aguilera's look missed the mark.

The Breakthrough Prize ceremony was the place to be for A-list actors, models, musicians, and billionaires over the weekend.