The award ceremony will have two famous actors as co-hosts.

co-hosts 是由前缀 co- 和名词 hosts 组成的复合词。co- 表示"共同、一起"，hosts 是 host 的复数形式，意思是"主持人"。 co-hosts 指"共同主持人"，即由多人一起担任主持工作。