The pantheon of people who have performed at Fenway Park includes Paul McCartney, Bruce Springsteen, and the Rolling Stones. Next up at the ballpark is the Bard himself. Thursday, Commonwealth Shakespeare Company will announce plans to celebrate its 20th year with “Shakespeare at Fenway,” an evening of famous scenes from William Shakespeare’s considerable canon performed by celebs from near and far. (We think it should be called “Shakespeare in the Pahk.”) To be directed by CSC’s founding artistic director Steven Maler, the event will take place Sept. 19. “All the ballpark’s a stage, and all the men and women merely players,” said Red Sox CEO Larry Lucchino. “We hope our ‘lyric little bandbox of a ballpark’ will be the perfect backdrop to the plays of the Bard and the performances of the Commonwealth Shakespeare Company’s talented artists.” (It was John Updike, not Shakespeare, that dubbed Fenway a “lyric little bandbox.”) The celebration at Fenway is in addition Commonwealth Shakespeare Company’s annual Free Shakespeare on the Common, which is “Twelfth Night” this summer, running from July 23-Aug. 10. We do hope former Red Sox players will be considered for roles in the evening of Shakespeare. Jacoby Ellsbury, for example, would be a good Hamlet (“To play or not to play, that is the question”); Kevin Millar would be convincing as any one of Shakespeare’s many fools; chicken-and-beer Josh Beckett is a natural Sir Toby Belch from “Twelfth Night”; and Johnny Damon and wife Michelle always have reminded us of Romeo and Juliet.