- Sister of Sula Miranda and Yara Miranda.
- Children: Thammy Miranda, Dedo, Sérgio, Gabriel and Giullia.
- Daughter, Giullia Vitória, with Juliano Cezimbra, born 10 June 2003.
- Gretchen and Dennis adopted a girl named Valentina on May 2010.
- After 39 days on the reality show "A Fazenda (The Farm)" Season 5, she decided to quit because she was missing her children (07/07/2012).
- Her artistic name was chosen after the 1976 film Aleluia, Gretchen (1976).
- She was the first contestant to left The Masked Singer Brasil. She was dressed as Rose. (01/22/2022).
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