Former sister-in-law of Mark Rosenberg and Paula Weinstein.
Has a son: Hugh Howard Rosenberg; born Oct 21, 1990 and named after Marg's father, who died in 1986 of complications from Multiple Sclerosis.
On ER (1994) episode #2.21, ER: Take These Broken Wings (1996), Karen Hines, the character she played, wears a Northwestern University pullover.
Had met ex-husband, Alan Rosenberg, in 1984 and they started dating in 1986.
51st birthday was the same date of airing the conclusion of the "CSI" series' "trilogy" crossover episodes.