Actress Zoe Saldana arrives at the 62nd Annual Directors Guild of America Awards in Los Angeles.
"They were kissing in front of the fire and being very affectionate. They are definitely very together," an onlooker tells us of the pair, who so far have been silent about their budding romance.
Another onlooker at the party said that the pair were caught in an intense conversation and were giggling, with Saldana touching Cooper's arm as he told a story before they retreated to a couch together.
"They were like two seventh graders. The electricity was out of this world."
The night before the party at Montage Deer Valley, the two attended an Acura-hosted premiere dinner together. The private party drew about 50 people, just castmembers and close friends of the actors, and Saldana and Cooper were spotted interacting with everyone at the dinner.