The couple attended a special luncheon hosted by director Baz Luhrmann ahead of a screening of Leonardo DiCaprio's latest drama in New York City on Wednesday (06Jan16).

The day marked Trudie's 62nd birthday, so during the event, held at Big Apple restaurant Kappo Masa, DiCaprio presented her with a cake and Sting sang Happy Birthday to her.

A source tells New York Post gossip column Page Six, "Leo presented Trudie with a cake and Sting took the mic and sang Happy Birthday in front of 100 people, so they got a free concert and sang along."

Other attendees included Star Wars: The Force Awakens actor Domhnall Gleeson and DiCaprio's The Revenant co-star Forrest Goodluck.