Julianne Moore is ''so happy'' she was crowned best actress at the Oscar Awards last night (22.02.15).

The 54-year-old star was over the moon when she picked up the big win of the night for her portrayal of Dr. Alice Howland, who suffers from the early-onset Alzheimer's Disease, in her movie 'Still Alice' at the Dolby Theater in Los Angeles on Sunday.

Speaking to the audience, she said: ''I'm so happy, I'm thrilled that we were able to shine a light on Alzheimer's disease. So many people who have this disease feel marginalized. People who have Alzheimer's disease deserve to be seen so we can find a cure.''

The strawberry blonde beauty looked stunning in a white floor-length strapless grown, which was embellished in crystals and subtle black detailing around the bust, hips and ankles.

She teamed the dress with simple sparkly earrings and kept her make-up minimal, but added a pop of colour with a dark lip.

The stunning star pushed her luscious locks off her face with the use of a low side bun to expose her defined jawline.

Meanwhile, Julianne admitted she spent four months speaking to women and doctors to prepare her for the role of Howland.

She explained: ''I like stories about real people and real relationships and real families.

''This movie had all of those things in it. It's about a real issue and relationships and who we love and what we value.''