|Family & Friends|
|Family:||Arthur Griffin (Father),unnamed Mother (Mother),|
|Friends:|| Carlos Garcia|
|First appearance:||Big Time Demos|
|Last appearance:||Big Time Party|
|Portrayed By:||Carlie Casey|
Mercedes Griffin (Carlie Casey) is the daughter of Arthur Griffin. She appears in Big Time Demos, where she pretends to be the "secret someone who picks the demos". She eventually dates all the boys, apart from James because she never dates people who are "prettier" than her. She makes her second and last appearance on the show in Big Time Party, where she is on a date with Logan. Mercedes finds out that Logan is dating her and Camille at the same time and breaks up with him. She then starts to date Guitar Dude. She seems to be nicer in this episode.
- She never dates anyone prettier then her, as said in Big Time Demos.
- It can be assumed that she's an only child based on the way her father spoils her.
- She's known to lie a lot.
- She knows a lot about marketing and promoting as she showed when telling her dad about facts of why Big Time Rush would be a better choice then Vampirah.
| Big Time Rush Wiki has|
related to Mercedes Griffin.
|"Finish your rapping!"|
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