Mary-Beth Williams
{{infobox character|
|image =MaryBethWilliams-GTAVCS.jpg|thumb|right|200px|Mary-Beth Williams
|size = 180px
|games = Grand Theft Auto: Vice City Stories
|name = Mary-Beth Williams
|aka =
|gender = F
|dob = 1984
|pob =
|dod =
|home = Little Haiti, Vice City Mainland, Vice City
|nationality = American
|family = Louise Cassidy-Williams (mother)
Marty Jay Williams (father)
Mary-Jo Cassidy (aunt)
Phil Cassidy (uncle)
|affiliations = Louise Cassidy-Williams
[[Marty Jay Williams
Mary-Jo Cassidy
Victor Vance
|vehicles =
|businesses =
|voice =A certain baby
}}
Mary-Beth Williams is the new born baby of Louise and Marty that appears a few times in the game. It is thought that after both her parents die her aunt Mary-Jo takes care of her.
Trivia
- Mary-Beth Williams is the only minor to be featured in the Grand Theft Auto series.
- Mary-Beth Williams is seen briefly in a blue Hawaiian blanket, similar to that of Tommy Vercetti's street shirt in Grand Theft Auto: Vice City.