|Betty Jean Tennyson|
|Powers and Abilities|
|Relatives|| Gordon Tennyson (husband)|
Max Tennyson (brother-in-law)
Vera Tennyson (sister-in-law)
Joel Tennyson (son)
Camille Mann-Tennyson (daughter-in-law)
Frank Tennyson (nephew)
Natalie Tennyson (niece)
Carl Tennyson (nephew)
Sandra Tennyson (niece)
Ben Tennyson (great-nephew)
Gwen Tennyson (great-niece)
|Voice Actor||B. J. Ward|
|First Appearance||Big Fat Alien Wedding|
She has black hair, blue eyes, and wears glasses.
In Big Fat Alien Wedding, her son Joel became engaged to a Lenopan, named Camille Mann (a union which would put an end to a decades long feud between the Sludges and the Plumbers). Both she and her husband were against the wedding at first (due to Camille being a Sludgepuppy), but later realized they had treated her unfairly and apologized, accepting Camille as their daughter-in-law.
- Big Fat Alien Wedding (first appearance)
She was named after her voice actress, B. J. Ward.
- Betty Jean is one of few known female members of the Tennyson family who is a member of the Plumbers.