Elizabeth "Beth" McIntyre is the daughter of Warren T. McIntyre, and is the long-time platonic friend of Rob Hawkins and romantic interest. She is friends with Lily Ford, Marlena Diamond, Jason Hawkins, and Hudson "Hud" Platt.
At the beginning of the film, she appears in a month-old recording in bed naked at her father's apartment while Rob playfully records. A month after their trip to Coney Island, Rob and Beth sleep together. However, she becomes upset with Rob after he seemingly ignores her. The night before Rob leaves for his new job in Japan, Beth brings another man, Travis, to the going-away party after her friend Lily invites her to come. After a heated argument between Beth and Rob, she and Travis leave the party.
Upon the monster's arrival, however, Rob calls Beth, but is distressed to hear her say that she is trapped in her father's apartment during the onslaught. Most of the film's plot concerns his attempt to rescue her and ensure her safety, a feat which Rob is able to accomplish, albeit with great difficulty — what with interceptions by the monster, its parasites, and the army making it nearly impossible. Finally, when Rob and the others find her, she is unconscious, impaled by a rebar of her building's structure.
After the rescue, she, along with Rob and Hud, board a helicopter that is treated to a bird's eye view of the assault on the monster, but is attacked in the process. She survives the monster attack and crash. After the death of Hud, she and Rob take cover under a nearby bridge and make a final recording, dedicating it to profession of love towards each other and to their deceased friends and family.
The bridge is then destroyed by the bombs on the final trump card used in the attempt to kill the monster. A recording after this shows Rob and Beth's date at Coney Island, which happened before the monster's attack. She ends the recording and the film with her words: "I had a good day".
- Status: Swinger
- Orientation: Straight
- Body type: 5' 7" / Slim / Slender
- Zodiac Sign: Virgo
- Smoke / Drink: No / Yes
- Children: Someday
- Occupation: Program Trader, Citigroup
- Collage: New York University, New York, NY; Graduated: 2002
- Student status: Alumni
- Beth dislikes Madden football and feels that the men she knows spend too much time playing it.
- Beth enjoys surfing and lateral riddles.
- Odette Yustman, who played Beth, also did a voice acting job in the game Fallout 3. She provided the voice for the character Amata.