Oscars 2015 red carpet pictures: Eddie Redmayne, Rosamund Pike, Hans Zimmer and a...

1. Reese Witherspoon takes a selfie at the Oscars 2015

Reese Witherspoon was credited with giving a boost to the Twitter hashtag #AskHerMore, a campaign to persuade journalists on the Oscars red carpet to focus on things other than what actresses were wearing on the night. Picture: Getty

Benedict Cumberbatch kisses Sophie Hunter hand

2. Benedict Cumberbatch and Sophie Hunter

Benedict Cumberbatch kisses the hand of his wife Sophie Hunter. Picture: Getty

3. Rosamund Pike arrives at the Oscars 2015

Rosamund Pike arrives at the Oscars in Hollywood. She was nominated for best actress for her role in Gone Girl. She was up against...

4. Marion Cotillard arrives at the Oscars 2015

...Marion Cotillard was nominated for best actress for her role in Two Days, One Night. At the Oscars tonight, she face competition from...

5. Felicity Jones at the Oscars 2015

...Felicity Jones was nominated for best actress for her part in The Theory of Everything. Here she is, arriving at the Oscars ceremony. Picture: Getty

6. Eddie Redmayne and Hannah Bagshawe at the Oscars 2015

And here's Felicity Jones's co-star, Eddie Redmayne, with his wife Hannah Bagshawe. Redmayne was nominated for best actor for his part in The Theory of Everything. He's already won a best actor Bafta for the role this year.

7. Alexandre Desplat at the Oscars 2015

Composer Alexandre Desplat arrives on the red carpet for the 87th Oscars in Hollywood, California. Desplat was nominated in the best score category for two films: The Grand Budapest Hotel and The Imitation Game. Photo: AFP / Valerie Macon/ Getty

8. Scarlett Johansson arrives at the Oscars 2015

Picture: Getty

9. Hans Zimmer

Composer Hans Zimmer arrives at the Oscars. He was nominated for best original score for the sci-fi movie Interstellar. He apparently wore this lovely scarf when he won an Oscar for The Lion King. Photo: Frazer Harrison/Getty Images

10. Benedict Cumberbatch and Sophie Hunter at the Oscars 2015

Benedict Cumberbatch and Sophie Hunter arrive at the Oscars. Cumberbatch was nominated in the best actor category for his turn as Alan Turing in The Imitation Game.

11. Miles Teller

Actor Miles Teller and model Keleigh Sperry attend the 87th Annual Academy Awards. Teller recently starred as a drummer in Whiplash, which was nominated for best picture. Photo: Jason Merritt/Getty Images

12. Michael Keaton arrives at the Oscars 2015

Best actor nominee Michael Keaton arrives at the Oscars. Picture: Getty

13. Lady Gaga arrives at the Oscars 2015

Lady Gaga wears red gauntlets on the red carpet. Picture: Getty

14. Keira Knightley and Lady Gaga at the Oscars 2015

Keira Knightley poses with Lady Gaga at the Oscars 2015.

15. Host Neil Patrick Harris arrives at the Oscars

Tonight's host Neil Patrick Harris (right) and his husband and actor David Burtka (left) attend the 87th Annual Academy Awards at Hollywood & Highland Center. Photo: Kevork Djansezian/Getty Images

16. Neil Patrick Harris and David Burtka

Neil Patrick Harris (right) and his husband David Burtka arrive on the red carpet for the 87th Oscars. Harris is tonight's host.

17. Julianne Moore at the Oscars 2015

Julianne Moore, who was widely tipped to win the best actress Oscar for her part in Boyhood, arrives at the Academy Awards ceremony. Picture: Getty

18. J. K. Simmons

J.K. Simmons arrives with his wife Michelle Schumacher on the red carpet for the 87th Oscars. Simmons was nominated for best supporting actor for his role as a charismatic but vicious music teacher in Whiplash. Photo: Mark Ralston/AFP/Getty Images

19. Jessica Chastain arrives at the Oscars 2015

Interstellar actress Jessica Chastain arrives. Picture: Getty

20. Ethan Hawke and Wife Ryan arrive at the Oscars 2015

Ethan Hawke and his wife Ryan arrive on the red carpet for the 87th Oscars. Hawke was nominated for best supporting actor for his part in Boyhood. Picture: Getty

21. Dakota Johnson at the Oscars 2015

50 Shades of Grey actress Dakota Johnson arrives at the Oscars. Picture: Getty

22. Dakota Johnson and mother Melanie Griffith at the Oscars 2015

50 Shades of Grey actress Dakota Johnson arrives with her mother Melanie Griffith on the red carpet for the 87th Oscars. Picture: Getty

23. Nicole Kidman arrives at the Oscars 2015

Picture: Getty

24. Lupita Nyong'o

Actress Lupita Nyong'o arrives at the Oscars in a dress reportedly made up of 6,000 pearls. Picture: Getty

25. Reese Witherspoon arrives at the Oscars 2015

Reese Witherspoon on the red carpet. Picture: Getty

26. Felicity Jones and Reese Witherspoon

Felicity Jones and Reese Witherspoon on the red carpet. Picture: Getty

27. Justin Theroux and Jennifer Aniston arrive at the Oscars 2015

Jennifer Aniston and her partner Justin Theroux arrive for the Oscars ceremony. Picture: Getty

28. Jennifer Aniston and Emma Stone at the Oscars 2015

Jennifer Aniston and Emma Stone share a hug on the red carpet. Picture: Getty

29. Jennifer Lopez arrives at the Oscars 2015

Picture: Getty

30. Gwyneth Paltrow arrives at the Oscars 2015

Picture: Getty

31. Laura Dern and family

Laura Dern arrives with her family on the red carpet for the 87th Oscars.

32. David Oyelowo arrives at the Oscars 2015

David Oyelowo, who is currently appearing as Martin Luther King Jr in Selma, arrives at the Oscars. Picture: Getty

33. Cate Blanchett arrives at the Oscars 2015

Picture: Getty

34. Patricia Arquette and Rosanna Arquette

Sisters Patricia Arquette and Rosanna Arquette attend the 87th Annual Academy Awards at Hollywood & Highland Center. Patricia was nominated for Best Actress in a Supporting Role.