“Hey ‘Chief Law Enforcement Officer of the Country’...Pardon THIS,” tweeted Hamill, who played Luke Skywalker early on in the iconic film series.
The tweet was accompanied by a promotion poster featuring multiple cast members.
The "Star Wars" holiday special was universally panned and hasn't been re-broadcast since its debut. Hamill is a frequent Trump critic and often takes to Twitter to criticize him and his administration.
The "request" comes after Trump issued a series of clemency decisions this week, including for former New York City Police Department (NYPD) Commissioner Bernard Kerik and "Junk Bond King" Michael Milken, who admitted to violating U.S. securities laws. Kerik, who was sentenced on tax fraud and false statement changes in 2010, served three years in prison.
Trump also granted a full pardon to Eddie DeBartolo Jr., 73, the former owner of the NFL's San Francisco 49ers, who pleaded guilty in 1998 for failing to report a bribe to Edwin Edwards, the former Democratic governor of Louisiana.
Former Illinois Gov. Rod Blagojevich had his 14-year prison sentenced commuted after serving eight years for corruption charges, including trying to sell the Senate seat left vacant by Barack Obama after his election as president.
Trump associate Roger Stone was sentenced to 40 months in prison on Thursday for witness tampering and other charges. In response, Trump blasted the criminal justice system and said Stone has a “very good chance of exoneration" while speaking to a group of ex-convicts who recently had completed a career training program.
Fox News' Tyler Olson, John Roberts and Morgan Phillips contributed to this report.