Ora, 23, and Richard were introduced by a mutual friend at a house party in Hollywood, reported Daily Mirror.
"One of Rita's friends invited her to a house party and introduced her to Richard. They clicked straight away and Rita seemed to be hanging on his every word. After a while they slipped away from the rest of the party. The new-found friendship was all everyone was talking about," a source said.
Tattooed millionaire Richard, 24, who performs under the name Ricky Hil, has shunned a career in fashion for music and also signed a deal with Warner Bros in 2011. He was arrested in 2010 after cops found cannabis in his car.