The Grand Budapest Hotel scriptwriter Wes Anderson won the Writers Guild of America (WGA) 2015 award for original screenplay, while Graham Moore's script for historical thriller The Imitation Game won for adapted screenplay.
The awards were announced in simultaneous ceremonies in Los Angeles and New York on February 14. Actress Lisa Kudrow hosted the West Coast ceremonies at the Century Plaza, while Larry Wilmore hosted the New York one, reports variety.com.
The Grand Budapest Hotel won over the scripts for Boyhood, Foxcatcher, Nightcrawler and Whiplash.
The Imitation Game won over screenplays for American Sniper, Gone Girl,Guardians of the Galaxy and Wild.
True Detective and Louie dominated the TV trophies where the former won the drama series award and new series award with both trophies going to its creator and writer Nic Pizzolatto.
Louie took the comedy series and the comedy episode awards.
Legal and political drama The Good Wife won the first award for drama series episode for the script for The Last Call, written by Robert King and Michelle King.
The animation award went to Brian Kelley for the Brick Like Me segment of The Simpsons.
Hollywood Game Night, hosted by Jane Lynch bagged the quiz show trophy.
The Internet's Own Boy: The Story of Aaron Swartz took home the documentary award for the script by Brian Knappenberger.
"Deliverance Creek, written by Melissa Carter, won the long form original trophy and Jane Anderson took the longform adapted award for Olive Kitteridge.
The videogame award went to The Last of Us: Left Behind, written by Neil Druckmann.
Shonda Rhimes won the Paddy Chayefsky award for career achievement in TV.
Margaret Nagle received the Paul Selvin award for Sudanese refugee drama The Good Lie.
The presentation of the Screen Laurel Award to the late Harold Ramis provoked the one standing ovation at the event and included well-received clips from Ghostbusters, Caddyshack, Groundhog Day and Animal House. Mr Ramis' son Daniel took the trophy on his behalf.
Actor-filmmaker Ben Affleck received the Valentine Davies Award for his service on the East Congo Initiative, which is an advocacy and grant-making initiative wholly focused on working with and for the people of Congo.