*Jeannie is not a very good babysitter at all, because while the baby's parents are out, she regularly relies on the telephone rather than doing her actual babysitting, and Tom and Jerry are shown to be better babysitters than she is.

When the baby crawls out of his bed in Busy Buddies and Tot Watchers, Tom and Jerry both do their best to bring him back home and put him in bed, but Jeannie claims that the two were "bothering" the baby, and she hits Tom with a broom (especially in Tot Watchers).

Despite her sub-standard babysitting skills, Jeannie's very kind and friendly and has many friends in high school. Her least favorite and weakest subject is apparently algebra, but she wants to do well in that particular class. In her final appearance, she eventually called the police so they can arrest Tom and Jerry whom they both claim to be "babynappers," until it was discovered that the baby started crawling out of the house, where she could eventually take the blame or not. She could probably defend the lines she crosses just to avoid being caught, in which the baby's parents end up giving in to her lies and false accusations in Busy Buddies and to the cops in Tot Watchers, especially to consider that the baby was close to being killed due to her negligence.

In Busy Buddies, Joan and George are going out and tell the babysitter, Jeannie, to look after an unnamed baby. However, she is more interested in talking on the telephone. At first, Tom and Jerry take the opportunity to help themselves to some food, Jerry helps himself to some cookies and Tom helps himself to a watermelon and milk, but they soon discover the baby crawling away while Jeannie continues to talk on the phone, unaware.

Jeannie is unaware through all of this (even when the baby crawls over her), and at one point even hits Tom with a book for "bothering the baby" when he returns the baby to the crib. At the end, Joan and George return and ask Jeannie how things went. She explains that she had a little trouble with Tom, but the baby was "no trouble at all".

In Tot Watchers, Babysitter Jeannie is instructed to look after the baby while his mother goes out. However, Jeannie pays more attention to talking on the telephone apathetically than her actual babysitting. In the midst of Tom and Jerry's usual fighting, they see the baby crawling out of his pram. Any attempt to return the baby to where he came from simply results in the baby escaping from the pram again. During one escape, the baby crawls into Spike's dog house. Tom accidentally grabs Spike instead of the baby, and is promptly attacked, scratched and bit. This time, Tom angrily brings the baby back to Jeannie herself, who hits Tom over the head with a broom, thinking that Tom has taken the baby away from her.

Later on, Jeannie is in panic and crying, telling a police officer that she was babysitting, took her eye off the baby for "one teensy minute" and the baby was gone. Tired Tom and Jerry arrive with the baby. Jeannie grabs the baby while the two try to escape, but the police officer (voiced by Bill Thompson) arrests Tom and Jerry, assuming that they were "baby nappers".

Jeannie has friends from high school, but only mentioned during dialogue on the telephone. Her friends include Mike, Gary, and Jane.

She spends too much of her time talking on the phone to her friends about their dates and her own activities.*