In contrast to the wig, her most recent blonde 'do is long enough to hold together in a bun as seen at the 2014 American Music Awards.
Ora, 24, is playing the role of Christian Grey's littler sister, Mia Grey. Her part gave the "Black Widow" singer a chance to transition beyond her career in music.
Ora recently told UK's Capital FM, "This was such a great cameo to be involved in, and even though it's only in for a little bit, it's opened a door to a lot of movie things that I haven't actually announced yet."
The highly anticipated Fifty Shades of Grey comes out in Feb. 2015 and is based on the best-selling erotic novel by E.L. James. The story is about a literature student Anastasia Steele (Dakota Johnson) who falls for a tormented billionaire, Christian Grey (Jamie Dornan), who shows her the world of S&M.
Christian's sister is not the only family member that you can get a glimpse of through movie posters. Here's a look at his parents.
Oscar winning actress Marcia Gay Harden takes on the role of Christian's mother, Dr. Grace Travelyan. Harden won an Oscar for Best Supporting Actress in 2000 when she played Lee Krasner in Pollock. She also won a Tony Award in 2009 for her role as Veronica in God of Carnage and has been in many tv shows including The Newsroom, Trophy Wife and Law & Order: Special Victims Unit.
Actor Andrew Airlie, 53, plays the father, Carrick Grey. He's also in Final Destination 2 as Christopher Corman and plays Todd Crane on BBC America's The Intruders.