Question: Who did the actor that plays Mark in "The Room" reunite with in Best Friends?

Context articles: Best Friends Forever (TV series)
Super Best Friends
Landscape (play)
David Mitchell (comedian)
Best Friends in Love
Greg Sestero
Lee Keun-ho
Best F(r)iends
Best Friends Together
Best Friends Getting Sorted

Best Friends Forever is an American sitcom series that ran on NBC from April 4, to June 1, 2012.
 The series aired during the 2011–12 NBC primetime season as a mid-season replacement and was created by real-life best friends Lennon Parham and Jessica St. Clair.
 The pilot episode was made available early through Hulu and NBC.com on March 21, 2012.
 NBC officially canceled the series on May 11, 2012.
"Super Best Friends" is the third episode of the fifth season of the American animated television series "South Park", and the 68th episode of the series overall.
 It first aired on Comedy Central in the United States on July 4, 2001.
 In the episode, Stan, Kyle, Cartman and Kenny discover the magician David Blaine performing in South Park and decide to join his cult, the Blaintologists.
 Stan quickly finds out that the Blaintologists are not as nice as everyone thinks and tries to convince the other boys they've been brainwashed, and have forsaken their friends and families.
 Teaming up with Jesus, Stan calls upon the Super Best Friends, a parody of the Super Friends, to destroy Blaine and thwart the mass suicide pact he has launched.
Landscape is a one-act play by Harold Pinter that was first broadcast on radio in 1968 and first performed on stage in 1969.
 The play shows the difficulties of communication between two people in a marriage.
 This is illustrated through the two characters who appear to be talking to one another though neither seems to hear the other.
 The dialogue resembles two independent monologues.
 The play is often studied, read, and performed alongside "Silence", another one-act play published soon after "Landscape".
 Both plays mark a change in Pinter's style, with echoes of the work of Samuel Beckett.
 In both plays nothing happens, the action of the plays is brought to a halt putting an added emphasis on the role of the dialogues and monologues that take place.
 As one critic put it "nothing happens but much is explored".
David James Stuart Mitchell (born 14 July 1974) is a British comedian, actor and writer.
 He is half of the comedy duo Mitchell and Webb alongside Robert Webb.
 The duo starred in the Channel 4 sitcom "Peep Show" in which Mitchell plays Mark Corrigan.
 Mitchell won the British Academy Television Award for Best Comedy Performance in 2009 for his performance in the show.
 The duo have written and starred in several sketch shows including "Bruiser", "The Mitchell and Webb Situation", "That Mitchell and Webb Sound" and also "That Mitchell and Webb Look".
 Mitchell and Webb also starred in the UK version of Apple's "Get a Mac" advertisement campaign.
 Their first film "Magicians" was released in 2007.
Best Friends in Love is the third and last part of the "Best Friends" series by Rosie Rushton.
 It was published in 1999 by Piccadilly Press Ltd.
Gregory Sestero (born July 15, 1978) is an American actor, model, producer and author.
 He is best known for his role as Mark in the 2003 cult film "The Room" and for his award-winning 2013 memoir "The Disaster Artist" about his life and experience making "The Room".
Lee Keun-ho (Hangul: 이근호 , born: 11 April 1985) is a South Korean football player who plays for Gangwon FC and South Korea national team.
 His pace, work-rate, and link-up plays mark him as a highly rated forward in Asia.
Best F(r)iends is an upcoming American comedy thriller film directed and co-produced by Justin MacGregor, written and co-produced by Greg Sestero, as well as co-produced by Kristopher MacGregor.
 It stars Sestero and Tommy Wiseau, reuniting them fourteen years after the cult classic "The Room", while also including Paul Scheer.
Best Friends Together is the first part of the Best Friends series by Rosie Rushton.
 It was published in 1998 by Piccadilly Press Ltd.
Best Friends Getting Sorted is the second part of the Best Friends series by Rosie Rushton.
 It was published in 1999 by Piccadilly Press Ltd.