Answer by taking a quote from the following article:

Patti Ann LuPone (born April 21, 1949) is an American actress and singer, best known for her work in stage musicals. She is a two-time Grammy Award winner and a two-time Tony Award winner. She is also a 2006 American Theater Hall of Fame inductee. LuPone began her professional career with The Acting Company in 1972 and made her Broadway debut in Three Sisters in 1973.

Among LuPone's film credits are Fighting Back, Witness, Just Looking, The Victim, Summer of Sam, Driving Miss Daisy, King of the Gypsies, 1941, Wise Guys, Nancy Savoca's The 24 Hour Woman and Savoca's Union Square (in post-production, late 2010), Family Prayers, and City by the Sea. She has also worked with playwright David Mamet on The Water Engine, the critically acclaimed State and Main, and Heist. In 2011, the feature film Union Square, co-written and directed by the Sundance Film Festival's Grand Jury Award Winner, Nancy Savoca, was premiered at the Toronto International Film Festival. In it, LuPone co-starred with Mira Sorvino, Tammy Blanchard, Mike Doyle, Michael Rispoli and Daphne Rubin-Vega. She played Lady Bird Johnson in the TV movie, LBJ: The Early Years (1987). LuPone played Libby Thatcher on the television drama Life Goes On, which ran on ABC from 1989 to 1993. In the 1990s she had a recurring role as defense attorney Ruth Miller on Law & Order. She has twice been nominated for an Emmy Award: for the TV movie The Song Spinner (1995, Daytime Emmy Award nominee), and for Outstanding Guest Actress in a Comedy Series on Frasier in 1998. She had a cameo as herself that year on an episode of Saturday Night Live hosted by Kelsey Grammer. LuPone's TV work also included a recurring role on her cousin Tom Fontana's HBO series in its final season, Oz (2003). She appeared as herself on a February 2005 episode of Will & Grace. She also appeared on the series Ugly Betty in March 2007 as the mother of Marc St. James (played by Michael Urie). LuPone had a recurring guest role as Frank Rossitano's mother on 30 Rock. LuPone appeared as herself in the season two finale of the television series Glee. LuPone guest starred on Army Wives on July 8, 2012. She reunited with fellow guest star Kellie Martin as her mother once again. LuPone appeared in the 2013 film Parker, an action-thriller. In 2013, LuPone was cast in the third season of the FX series American Horror Story as Joan Ramsey, a religious mother with a hidden past, and played herself in the third season of HBO's Girls. In 2015, she appeared in several episodes of the Showtime horror series Penny Dreadful as a cantankerous yet powerful white witch. She returned to the show in 2016 in the role of Dr. Seward, an alienist aiding Eva Green's character. Seward is an adaptation of John Seward from Bram Stoker's Dracula, and claims to be a descendant of Joan Clayton, the character LuPone portrayed in the second season. Also in 2016, she began appearing in Steven Universe as the voice of Yellow Diamond.

For what role?
for the TV movie The Song Spinner (1995, Daytime Emmy Award nominee), and for Outstanding Guest Actress in a Comedy Series on Frasier in 1998.