Question: Are Jim Sharman and Chris Columbus both from the same nationality?

Context paragraphs:
The Night the Prowler: The Night the Prowler (also known as "Patrick White's The Night the Prowler") is a 1978 Australian film written by Patrick White, produced by Anthony Buckley and directed by Jim Sharman.  Ruth Cracknell was nominated in 1979 for an AFI Award for Best Actress in a Lead Role for her part.

The Rocky Horror Picture Show (disambiguation): The Rocky Horror Picture Show is a 1975 musical comedy horror film directed by Jim Sharman.

Summer of Secrets (film): Summer of Secrets is a 1976 film directed by Jim Sharman.

Jim Sharman: James David Sharman (born 12 March 1945), the son of boxing tent entrepreneur Jimmy Sharman, is an Australian director and writer for film and stage with more than 70 productions to his credit.  He is renowned in Australia for his work as a theatre director from the 1960s to the present, and is best known internationally as the director of the 1973 theatrical hit "The Rocky Horror Show", its film adaptation "The Rocky Horror Picture Show" (1975) and the film's follow-up "Shock Treatment" (1981).

List of unproduced Chris Columbus projects: The following is a list of unproduced Chris Columbus projects in roughly chronological order.  During his long career, American film director Chris Columbus has worked on a number of projects which never progressed beyond the pre-production stage under his direction.  Some of these projects, are officially scrapped or fell in development hell.

Shock Treatment: Shock Treatment is a 1981 American black comedy musical film directed by Jim Sharman, and co-written by Sharman and Richard O'Brien.  It is a follow-up to the 1975 film "The Rocky Horror Picture Show".

Chris Columbus (filmmaker): Chris Joseph Columbus (born September 10, 1958) is an American filmmaker.  Columbus is known for directing movies such as "Home Alone" (1990), "" (1992), "Mrs. Doubtfire" (1993), "Harry Potter and the Sorcerer's Stone" (2001), and "Harry Potter and the Chamber of Secrets" (2002), and for writing movies such as "Gremlins" (1984) and "The Goonies" (1985).

Anne Looby: Anne Looby, is an Australian actress and stage director, since graduating from NIDA in 1988, Anne Looby has worked in film, television and theatre.  Her theatrical experience is extensive, having worked with some of the best directors in Australia including Gale Edwards, Rodney Fisher, Jim Sharman and George Ogilvy, on work ranging from the classics to contemporary theatre.  Looby has also worked extensively in film and television, appearing in such television classics as A Country Practice and the award winning ABC mini-series Simone De Beauvoir’s Babies.  She has appeared in the feature films "Willfull", "Daydream Believer" and most recently with John Malkovich in Disgrace.  Looby received the Sydney Theatre Critics award for Best Actress in Arcadia for the STC and has also been awarded an AFI as Best Actress in a TV Mini Series for her performance in Simone De Beauvoir’s Babies.

The Rocky Horror Picture Show: The Rocky Horror Picture Show is a 1975 British-American musical screwball comedy horror film by 20th Century Fox produced by Lou Adler and Michael White and directed by Jim Sharman.  The screenplay was written by Sharman and actor Richard O'Brien, who appears in the film, which is based on the 1973 musical stage production "of the same title", with music, book, and lyrics by O'Brien.  The production is a parody tribute to the science fiction and horror B movies of the 1930s through to the early 1970s.  Along with O'Brien, the film stars Tim Curry, Susan Sarandon, and Barry Bostwick and is narrated by Charles Gray with cast members from the original Royal Court Theatre, Roxy Theatre, and Belasco Theatre productions.

Shirley Thompson vs. the Aliens: Shirley Thompson vs. the Aliens is a 1972 film directed by Jim Sharman and starring Jane Harders and Helmut Bakaitis.  It is the first feature-length film from Sharman, who subsequently directed "The Rocky Horror Picture Show" (1975).

Supporting paragraphs: Jim Sharman Chris Columbus (filmmaker)
Answer: no