Mark Rylance
Sir David Mark Rylance Waters (born 18 January 1960) is an English actor, theatre director, and playwright. He was the first artistic director of Shakespeare's Globe in London, between 1995 and 2005. After training at the Royal Academy of Dramatic Art in London, Rylance made his professional debut at the Citizens Theatre, Glasgow in 1980. He appeared in the West End productions of "Much Ado About Nothing" in 1994 and "Jerusalem" in 2010, winning the Olivier Award for Best Actor for both. He has also appeared on Broadway, winning three Tony Awards: two for Best Actor for "Boeing Boeing" in 2008 and "Jerusalem" in 2011, and one for Best Featured Actor for "Twelfth Night" in 2014. He received Best Actor nominations for "Richard III" in 2014 and "Farinelli and the King" in 2017. He is one of only eight actors to have won the Tony Award for Best Actor in a Play twice while his nominations for "Richard III" and "Twelfth Night" in 2014 make him one of only six performers to be nominated in two acting categories in the same year.
Mark Rylance
Rylance's film appearances include "Prospero's Books" (1991), "Angels and Insects" (1995), "Institute Benjamenta" (1996), "Intimacy" (2001), "The Other Boleyn Girl" (2008) and "Dunkirk" (2017). He has garnered attention in the 21st century for his collaborations with director Steven Spielberg, winning the Academy Award and BAFTA Award for Best Supporting Actor for his portrayal of Rudolf Abel in Spielberg's "Bridge of Spies" (2015) and subsequently collaborating with the director to play the title role in "The BFG" (2016), a live-action film adaptation of the children's book by Roald Dahl, and James Halliday in "Ready Player One" (2018), based on the novel of the same name.
Ready Player One (film)
Ready Player One is a 2018 American science fiction action-adventure film directed by Steven Spielberg, from a screenplay by Zak Penn and Ernest Cline based on Cline's 2011 novel of the same name. It stars Tye Sheridan, Olivia Cooke, Ben Mendelsohn, Lena Waithe, T.J. Miller, Simon Pegg, and Mark Rylance. It takes place in 2045, when much of humanity uses the virtual reality software OASIS (Ontologically Anthropocentric Sensory Immersive Simulation) to escape the desolation of the real world. Orphaned teenager Wade Watts (Sheridan) finds clues to a hidden game that promises OASIS's ownership to the winner, and he and four allies try to complete it before a corporation run by businessman Nolan Sorrento (Mendelsohn) can do so.
Ready Player One (film)
"Ready Player One" premiered at South by Southwest in Austin, Texas on March 11, 2018, and was theatrically released by Warner Bros. Pictures in the United States on March 29, 2018, in Dolby Cinema, RealD 3D, IMAX, 4DX, and IMAX 3D. It grossed over $582 million and received generally positive reviews; critics praised its visuals and brisk pacing but criticized the character development. The film was noted to have significant differences from the book, and some critics said the film's plot was an improvement over the source material. It also received nominations at the 91st Academy Awards, 24th Critics' Choice Awards, and 72nd British Academy Film Awards, all for visual effects.

Question: Which academy award did Ready Player one actor Mark Rylance win? 
Answer: Best Supporting Actor