Christa Miller is an American actress. She was born in New York City, the daughter of model Bonnie Trompeter. Miller was a model as a child, appearing in a Wonder Bread commercial when she was six months old, posing at three for Francesco Scavullo in an Ivory soap advertisement, and being photographed for the cover of Redbook. Her days as a child model were curtailed after an operation for a benign bone tumor.

After attending Convent of the Sacred Heart she returned briefly to modeling, but soon took acting lessons, and gave up modeling when she moved to Los Angeles, California, in 1990. She was in the first edition of Maxim.

Miller's first role on television was in Kate & Allie, which starred her real-life aunt, Susan Saint James. She appeared in episodes of Northern Exposure, Fresh Prince of Bel Air, and Party of Five. She had a major role on The Drew Carey Show from 1995-2002 as Kate O'Brien, and was the voice of Cleopatra in the short-lived animated show Clone High. Miller appeared twice on Seinfeld, as two different characters. In "The Sniffing Accountant", she was the boss of George Costanza's potential employer, and in "The Doodle" she was a woman whom George unsuccessfully dates.

In 2001, Miller's husband, writer-producer Bill Lawrence, conceived a new comedy-drama, Scrubs. Miller was given a guest role as Dr. Cox's (John C. McGinley) bitter ex-wife Jordan Sullivan. Originally, the character was intended to appear in only one episode; in season 2, the role became recurring. When her young cousin Teddy Ebersol, son of Susan St. James and Dick Ebersol, died in a plane crash in 2004, Scrubs dedicated the "My Lucky Charm" episode to him.

Miller also had a leading role in the 2008 TV miniseries The Andromeda Strain.

Miller has three children with Bill Lawrence: Charlotte Sarah (born June 8, 2000), William Stoddard (born January 3, 2003), and Henry Vanduzer (born October 8, 2006). Her last two pregnancies were written into Scrubs.