At the age of 69, Jacqueline Bisset is beautiful as ever. The British actress, whose credits include “Bullitt” with Steve McQueen, François Truffaut’s “Day for Night,” and, perhaps most memorably to many teenage boys, 1977’s underwater thriller “The Deep,” is on Nantucket at the moment shooting “Peter and John.” Directed by Jay Craven, based on the book of the same name by Guy de Maupassant, “Peter and John” is the story of the strained relationship of two brothers. Bisset plays their striking mother. The small-budget film is being produced by the Vermont-based nonprofit Kingdom County Productions, in partnership with Marlboro College. It costars Gordon Clapp, best known for his work on “NYPD Blue,” Christian Coulson, who was in “The Hours,” and Dianne Guerrero of the Netflix prison dramedy “Orange Is the New Black.” Bisset is enjoying something of a career renaissance, having won a Golden Globe Award for her role in the BBC miniseries “Dancing on the Edge.” (Her acceptance speech was memorable for all the wrong reasons.) Filming of “Peter and John” runs through May 10.