Question: What was the birth name of the actress who co-starred with Fred Astaire in "Royal Wedding"?

Context articles: Fred Astaire Dance Studios
You're All the World to Me
James Trittipo
An Evening with Fred Astaire
Mel Tormé Sings Fred Astaire
Funny Face (musical)
Flashing Spikes
Jane Powell
Royal Wedding
Alcoa Premiere

Fred Astaire Dance Studios, Inc. is a ballroom dance franchise chain of studios in the United States and Canada, named after and co-founded by famous dancer Fred Astaire.
 It is headquartered in Longmeadow, Massachusetts, USA.
"You're All The World to Me" is an American song written in 1950 by composer Burton Lane and lyricist Alan Jay Lerner for the 1951 MGM musical, "Royal Wedding".
 The lyrics by Lerner, who also wrote the story and screenplay, give song-and-dance man Tom Bowen, played by Fred Astaire, the opportunity to proclaim his love for Anne Ashmond (Sarah Churchill) while dancing on the walls and ceiling of a custom-made set which, along with an attached camera and camera operator, rolled on an axis to provide the anti-gravity illusion.
James Trittipo (June 30, 1928 — September 15, 1971) was an American television art director and stage set designer in New York and Hollywood, known for his designs of television variety shows including "The Frank Sinatra Show (CBS)", "", and "An Evening with Fred Astaire".
 Trittipo won Art Direction Emmy Awards for the ABC Television variety series "The Hollywood Palace" and "An Evening with Fred Astaire".
 He designed a set "evocative of waterfront pilings" for Rod McKuen's May 10, 1969 television special on NBC.
 He died of a heart attack at age 43.
An Evening with Fred Astaire is a one-hour live television special starring Fred Astaire, broadcast on NBC on October 17, 1958.
 It was highly successful, winning nine Emmy awards and spawning three further specials, and technically innovative, as it was the first major television show to be recorded on color videotape.
 It was produced at NBC's Color City studios in Burbank, California.
Mel Tormé Sings Fred Astaire is a 1956 album by Mel Tormé, recorded in tribute to Fred Astaire.
 This was Tormé's second recording with Marty Paich and his Dek-Tette.
Funny Face is a 1927 musical composed by George Gershwin, with lyrics by Ira Gershwin, and book by Fred Thompson and Paul Gerard Smith.
 When it opened on Broadway on November 22, 1927, as the very first show on the newly built Alvin Theatre, it starred Fred Astaire and his sister Adele Astaire.
 It was in this show that Fred Astaire first danced in evening clothes and a top hat.
"Flashing Spikes" is a 1962 television play directed by John Ford and starring James Stewart, with a lengthy surprise appearance by John Wayne, billed in the credits as "Michael Morris" (apparently based on Wayne's birth name "Marion Michael Morrison").
 The hour-long drama revolving around a disgraced ex-baseball player (Stewart) was broadcast as an episode of the anthology series "Alcoa Premiere" hosted by Fred Astaire.
Jane Powell (born Suzanne Lorraine Burce; April 1, 1929) is an American singer, dancer and actress who rose to fame in the mid-1940s with roles in various musicals as a contract player for Metro-Goldwyn-Mayer pictures.
Royal Wedding is a 1951 Metro-Goldwyn-Mayer musical comedy film starring Fred Astaire and Jane Powell, with music by Burton Lane and lyrics by Alan Jay Lerner.
 The film was directed by Stanley Donen; it was his second film and the first he directed on his own.
 It was released as Wedding Bells in the United Kingdom.
Alcoa Premiere (also known as Premiere, Presented by Fred Astaire) is an American anthology drama series that aired from October 1961 to July 1963 on ABC.
 The series was hosted by Fred Astaire, directed by Norman Lloyd among others, and executive produced by Alfred Hitchcock.
 Astaire also starred in several of the episodes.