Born in Los Angeles, CA. He entered films as a cutter in 1935, straight out of college, and had worked his way up to producer by the early 1950s. As such, REBEL WITHOUT A CAUSE (1955) stands out as his one important project among mostly routine productions [e.g., THEM!, 1954; OUR MISS BROOKS and LOVE ME TENDER, 1956; APRIL LOVE, 1957; KID GALAHAD, 1962; RIO CONCHOS, GOODBYE CHARLIE and THE PLEASURE SEEKERS, 1964; VALLEY OF THE DOLLS, 1967; THE LEGEND OF CUSTER, 1968 (also writer)]. Weisbart's film editing credits include some of Warners' best during the decade: YOU CAN'T ESCAPE FOREVER (1942), THE CONSTANT NYMPH (1943), MILDRED PIERCE (1945), NIGHT AND DAY (1946), DARK PASSAGE (1947), JOHNNY BELINDA (1948), THE FOUNTAINHEAD (1949), THE GLASS MENAGERIE (1950), and A STREECAR NAMED DESIRE (1951).    Nominated for Film Editing 1948: JOHNNY BELINDA 1 nomination