PARIS — Studiocanal has nabbed French rights to Simon Curtis’ “My Week With Marilyn.”The British pic’s high-profile cast includes Emma Watson, Michelle Williams and Kenneth Branagh. Pic recounts Colin Clark’s experiences as third assistant director on “The Prince and the Showgirl” with Marilyn Monroe in 1957. Script is based on Clark’s diaries. Produced by the Weinstein Co., BBC Films and Trademark Films, pic has played numerous fests, including New York, Mill Valley and AFI. TWC will distribute “Marilyn” Stateside on Nov. 23. Studiocanal will release “Marilyn” on March 7 in Gaul, according to trade mag La Film Francais.