<P> Later on, Deanna is up to repeat her presentation in class . She is still nervous until Maddie, Helen, Amanda, Debbie, and all the sorority sisters show up to support her, and Deanna manages to give the presentation with ease . </P> <P> At the end of the year, Deanna and Maddie graduate together, with all their friends and family there to support them . Maddie encourages Deanna to throw her cap in the air . She does so, and it hits Dan in the face, knocking out an earring he was wearing while Marcie berates him for losing the expensive diamond stud . </P> <Ul> <Li> Melissa McCarthy as Deanna "Dee Rock" Miles (née Cook) </Li> <Li> Molly Gordon as Maddie Miles, Dan and Deanna's daughter </Li> <Li> Gillian Jacobs as Helen, a sorority sister who is older than the rest due to having been in a coma for eight years . </Li> <Li> Maya Rudolph as Christine Davenport, Deanna's neurotic and heavy drinking best friend </Li> <Li> Jessie Ennis as Debbie, a sorority sister with "issues" </Li> <Li> Adria Arjona as Amanda, another sorority sister with "issues" </Li> <Li> Debby Ryan as Jennifer, a "mean girl" in Deanna's archaeology class </Li> <Li> Matt Walsh as Daniel "Dan" Miles, Deanna's ex-husband, Maddie's father </Li> <Li> Julie Bowen as Marcie Strong, a real estate agent, Deanna's nemesis and Dan's lover </Li> <Li> Stephen Root as Michael "Mike" Cook, Deanna's father and Maddie's grandfather </Li> <Li> Jacki Weaver as Sandy Cook, Deanna's mother and Maddie's grandmother </Li> <Li> Luke Benward as Jack Strong, a frat boy infatuated with Deanna </Li> <Li> Jimmy O. Yang as Tyler, Maddie's boyfriend and Jack's friend </Li> <Li> Chris Parnell as Wayne Truzack, Deanna's professor </Li> <Li> Heidi Gardner as Leonor, Deanna's reclusive Goth roommate </Li> <Li> Yani Smone as Trina, Jennifer's snarky sidekick </Li> <Li> Damon Jones as Frank Davenport, Christine's husband </Li> <Li> Ben Falcone as Dale, the Uber driver </Li> <Li> Nat Faxon as Lance </Li> <Li> Sarah Baker as Gildred </Li> <Li> Karen Maruyama as Mediator </Li> <Li> Steve Mallory as Bill </Li> <Li> Courtney Patterson as Amy </Li> <Li> Steve Falcone (Ben Falcone's real - life father) as Older Man #1 / Vince </Li> <Li> Michael D. McCarthy (Melissa McCarthy's real - life father) as Older Man #2 / Dennis </Li> <Li> Christina Aguilera as herself (cameo) </Li> </Ul> <Li> Melissa McCarthy as Deanna "Dee Rock" Miles (née Cook) </Li>

Who played the daughter in life of the party