(written from a Production point of view)
Grace Bustos (born 5 May 1975; age 42) is an actress who played a science division Valiant cadet in the Star Trek: Deep Space Nine episode "Valiant". She received no credit for her appearance and was identified by the name tag of her costume which was sold off on the It's A Wrap! sale and auction on eBay. 
Born as Grace Lee Bustos in San Fernando Valley, Los Angeles, California, she appeared in background and supporting roles in the drama Boogie Nights (1997, with Michael Jace, Mike Gunther, and Coleman McClary), the television comedy Jerry Seinfeld: I'm Telling You for the Last Time (1998), the short film Building Bridges (2000), the comedy Orange County (2002, with George Murdock, Manu Intiraymi, and David Doty), and the television series Providence (2002, with Michael Ensign, Jeffrey Nordling, and Mary Stein) and My Name is Earl (2006).
Bustos served as stand-in on the television series Freaks and Geeks (1999-2000, starring Becky Ann Baker), Grosse Pointe (2000-2001), The Division, Lizzie McGuire (starring Hallie Todd), Karen Sisco (2003-2004), Jack & Bobby (2004-2005), and Big Love.
More recently, she portrayed Carmen in the comedy Big Ball'n (2007) and its sequel Big Ball'n 2... Pimp'n Ain't Easy (2008).