From Naomi Watts’ portrayal of national sweetheart Princess Diana and Michelle Williams’ imitation of 50s siren Marilyn Monroe to Meryl Streep playing the gritty former PM Margaret Thatcher – see the stars embodying real life historical and Hollywood icons on the silver screen.
Naomi Watts ramped up the glamour to play the role of Princess Di in controversial biopic 'Diana'. Following the last two years of her life, the film delves into her secret love affair with heart surgeon Hasnat Khan as well as her relationship with Dodi Fayed.
Confessing to Manhatten magazine that it was one of the "hardest things" she'd ever done, Naomi said: "I want to try to embody her and get the essence of her. Those things are really important to me."
Nicole Kidman channels her most stylish self to embody film siren and fashion icon Grace Kelly in a story of her marriage and identity crisis as both a Hollywood star and Princess of Monaco.
The stunning Australian actress told NBC: "It was a real honour to play her and I hope I captured her essence. I mean you never know, but it won't be for lack of trying!"
Amanda Seyfried stripped off to play 70s porn superstar Linda Lovelace in the Hollywood biopic, portraying Linda's life of sex industry abuse at the hands of her controlling husband before she took control of her life.
"I wanted a challenge to risk myself and there's nothing riskier than taking responsibility for a real person's voice," she told BBC News.
Lindsay Lohan immortalized on-screen legend Elizabeth Taylor in Hollywood movie Liz & Dick, which reveals the torrid relationship between Liz and husband Richard Burton.
Despite playing the glamorous star, Li-Lo revealed to Jay Leno she missed out on the opportunity of meeting her: "She had actually sent me a ring once and invited me to dinner, but I was genuinely just too nervous!"
Michelle Williams bleached her locks and nipped in her waist to play Hollywood legend Marilyn Monroe in a movie that tracks the tense relationship between Sir Laurence Olivier and the buxom siren.
Speaking to Elle magazine, Michelle revealed her fears at playing such an iconic star: "I was so apprehensive. It was daunting living up to people's expectations as well as my own expectations. I wanted to hop on the next train to the Alps or something and get the hell out because it was terrifying."
Meryl Streep turned her acting talents to embody the first female Prime Minister in the Oscar-winning biopic The Iron Lady. An elderly Margaret Thatcher struggles with both illness and the death of her husband as she revisits her past, from girlhood to becoming PM.
"To me she was a figure of awe for her personal strength and grit," Meryl revealed in a statement following Margaret Thatcher's death.
Beyoncé used her expert pipes to play soul singer Etta James in a film about the rise of soul, jazz and rock label Chess Records and its recording artists.
Taking to her own website to talk all things Etta, Bey gushed: "I am so fortunate to have met such a queen. Her musical contributions will last a lifetime. Playing Etta James taught me so much about myself, and singing her music inspired me to be a stronger artist."
Helen Mirren refined her RP accent for the role of Queen Elizabeth II in a movie that portrays the aftermath of Princess Diana's death within the royal family.
But the British actress told The Telegraph she didn't want to completely mimic Elizabeth II, saying: "I am not impersonating her. Of course, I have got to look like her, move like her, sound like her, but it is my interpretation because we are artists and we are allowed to do that.”
Jennifer Love Hewitt slipped into a fitted black dress and pearls for her portrayal of iconic actress and fashionista Audrey Hepburn. The eponymous movie tracked the siren's life from childhood through World War II, her parents' divorce to making it as a star in the US.
"Never in my life have I been captivated by by anybody onscreen the way I was when I saw Audrey Hepburn for the first time," Jen gushed to Cosmopolitan. "She's everything a woman should be."
Madonna rustled up all the flair and charisma in her bones to play Argentina's powerful first lady Eva Perón in a biopic that follows her on an emotional and turbulent journey from childhood through to her final days.
Madge insisted she was perfect for the role all along, telling film critic Roger Ebert she was "possessed by her".