Ricci cited in court papers “irreconcilable differences” as the reason for the breakup.
She also requested sole legal and physical custody of their 5-year-old son, Freddie.
The documents were filed in Los Angeles Thursday.
Ricci was granted an emergency protective order against Heerdegen after police were called to their home for an alleged domestic battery incident on June 25.
Heerdegen was not arrested.
Ricci and Heerdegen had been a couple since 2011.
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