Nnaji started her acting career as a child actor in the television
soap opera Ripples at the age of eight. In 1998, at the age of 19 she was introduced into the growing Nigerian film industry with the movie
Most Wanted. Her subsequent movies include
Last Party,
Mark of the Beast and
Ijele. Nnaji, alongside eight other actors known as the
G8,
Omotola Jalade Ekeinde,
Richard Mofe-Damijo,
Emeka Ike,
Ramsey Nouah,
Nkem Owoh,
Stella Damasus, and
Jim Iyke, was banned in 2004 for charging excessively high fees. In the same year, Nnaji signed a recording contract with
EKB Records; a Ghanaian record label, and released her debut album
One Logologo Line. It was a mix of
R&B,
hip-hop and
urban music. In 2004, Nnaji was voted the face of
Lux. In 2005, she won the
Africa Movie Academy Award (AMAA) for Best Actress in a Leading Role, becoming the first actress to win the award. In 2009, Nnaji was one of the highest-paid female actor in
Nollywood. Due to her contributions to the Nigerian movie industry, she became the first actor to be awarded Best Actress at the 2001
City People's Awards, the award ceremony that previously had only recognised politicians and business conglomerates. She was also the first actor to be awarded as Best Actress by the Censors Board of Nigeria in 2003. In 2009, she was referred to as the
Julia Roberts of Africa by
Oprah Winfrey. In November 2015, Nnaji produced her first movie called
Road to Yesterday, later winning Best Movie Overall -West Africa at the
2016 Africa Magic Viewers' Choice Awards. In January 2018, it was reported that Nnaji would be replacing
Funke Akindele as a member of the
Dora Milaje in
Marvel's Avengers: Infinity War. This was later debunked as an internet prank and the actor did not appear in the movie. On 7 September 2018, her directorial debut
Lionheart was acquired by online streaming service
Netflix, making it the first
Netflix original film from Nigeria. The movie premiered at the 2018
Toronto International Film Festival, where she also appeared in
Adewale Akinnuoye-Agbaje's autobiographical directorial debut
Farming, alongside
Kate Beckinsale,
Damson Idris and
Gugu Mbatha-Raw. In 2023, it was announced that Nnaji would return as an executive film producer with
I Do Not Come to You by Chance, an adaptation of the novel by
Adaobi Tricia Nwaubani, alongside Chinny Carter. The film features
Blossom Chukwujekwu,
Paul Nnadiekwe,
Jennifer Eliogu,
Sambasa Nzeribe, and
Beverly Osu. It premiered at the Toronto International Film Festival but has not yet been officially released. Nnaji is also a women's activist. She advocates for Nigerian girls to be able to have a say in who they choose to marry. She is against early marriages for the girl child. She advocates against the
abuse of women in society. Nnaji has described herself as a feminist, stating that her type of
feminism is that of a woman who has the right to make her own choices and do whatever she feels like.
Modelling Nnaji has featured in several commercials, including Pronto (beverage) and Omo detergent. In 2004, she became the "Face of
Lux" in Nigeria. In May 2010, she was appointed as the "Face of MUD" in Nigeria. ==Awards and nominations==