- She has played the teenage version of Jennifer Garner's character in two separate films: 13 Going on 30 (2004) and Ghosts of Girlfriends Past (2009).
- Has four older brothers: Bryan, Derrick, Tyler and Steven. She also has four older stepbrothers: Matthew, Jason, Patrick and Brady.
- Started attending acting lessons at the age of nine.
- In her film debut, the song "Love Is a Battlefield", performed by Pat Benatar, was prominently featured. In 2009, Christa appeared on an episode of the medical drama ER (1994) titled "Love is a Battlefield".
- Shares her birthday with her 13 Going on 30 (2004) co-star Alexandra Kyle, who played young Tom Tom.
- Her film debut was 13 Going on 30 (2004) as young Jenna Rink.
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