Be... You and Me, which was inspired by her young niece Dionne Gordon. She went on to create multiple recordings and television specials of and related to that title: Free to Be... You and Me (1972, 1974) and Free to Be... A Family (1987), with Christopher Cerf. Also in 1972, she served as a California delegate to the Democratic National Convention in Miami Beach, Florida. She helped the George McGovern presidential campaign in October 1972 at Star-Spangled Women for McGovern–Shriver, reciting a parody of Erich Segal's Love Story for 19,000 people at Madison Square Garden. In 1973, Thomas joined Gloria Steinem, Patricia Carbine, and Letty Cottin Pogrebin as the founders of the Ms. Foundation for Women, the first women's fund in the US. The organization was created to deliver funding and other resources to organizations that were presenting liberal women's voices in communities nationwide. In 1976, Thomas made a guest appearance on the NBC situation comedy The Practice as a stubborn patient of her father Danny Thomas' character Dr. Jules Bedford, and the chemistry of father and daughter acting together made for touching hospital-room scenes. She has made guest appearances on several television series, including Law & Order: Special Victims Unit (as Judge Mary Conway Clark, a mentor of ADA Casey Novak), Ballers, The New Normal, Wet Hot American Summer: Ten Years Later. She also narrated the series Happily Never After on Investigation Discovery. From 1996 to 2002, Thomas played Rachel Green's mother, Sandra Green, on the TV show Friends. Thomas appeared in films such as Jenny (1970), Thieves (1977), In The Spirit (1990), The Real Blonde (1997), Starstruck (1998), Deuce Bigalow: Male Gigolo (1999), Playing Mona Lisa (2000), LOL (2012) with Demi Moore and Miley Cyrus, and Cardboard Boxer (2014). She also starred in television movies including It Happened One Christmas (1977; also produced) (a remake of It's a Wonderful Life), The Lost Honor of Kathryn Beck (1984; also produced), Consenting Adult (1985), Nobody's Child (1986; Best Dramatic Actress Emmy), Held Hostage: The Sis and Jerry Levin Story (1991; also produced), Reunion (1994; also produced), Deceit (2004; also produced), and Ultimate Betrayal (1994). Thomas' Broadway theatre credits include Thieves (1974), Social Security (1986), and The Shadow Box (1994), and in 2011, she starred as Doreen in Elaine May's comedy George Is Dead in Relatively Speaking during a set of three one-act plays (The New York Times called Thomas' performance