<Li> Philip Halpert is Pam and Jim's infant son, named after Pam's grandfather (to Angela's rage, as she wanted Pam to give up the name so she could have it for herself in tribute to her favorite cat). In the eighth - season premiere, Pam is approximately 8 months pregnant, and she and Jim reveal to the camera crew that they are expecting a boy . Unlike with his older sister, there was no episode focusing on Philip's birth; it was instead announced on a blog . </Li> <Ul> <Li> Gerald (Robert Pine) and Betsy Halpert (Perry Smith) are Jim's parents . In "Frame Toby", Jim purchases their house, where he grew up, for him and Pam to live in . They first appear on - screen in "Niagara", where they attend their son's wedding to Pam . During the ceremony, Gerald can be seen wearing a kilt . </Li> <Li> Thomas (Blake Robbins) and Peter Halpert (Tug Coker) are Jim's obnoxious older brothers who, like him, possess a great love for practical jokes . They first appear in "Employee Transfer", in which they have lunch with their brother and his fiancée . However, unbeknownst to Jim, Pam met with them before lunch to clue them in on a prank she would be playing on him, but Tom and Pete instead decided to make fun of her interest in art, as opposed to Pam's idea of losing her engagement ring . During lunch, they make numerous insults towards her art career, causing Jim to come to her defense . After the argument escalates, Tom and Pete reveal it to be a prank, with Pam awkwardly confirming this . Afterward, Jim receives a text message from them welcoming Pam into the family, and Pam suggests they should "prank" Tom about being bald over Thanksgiving . They later reappear in "Niagara", attending Jim and Pam's wedding, for which they (along with Michael and Dwight) organize to have everyone dance down the aisle in the style of the viral video, JK Wedding Entrance Dance . </Li> <Li> Katy Moore (Amy Adams) is a handbag saleswoman, who stops by the office in the season one finale, "Hot Girl". Upon seeing her, both Michael and Dwight are instantly attracted to her, with Michael commenting that she is like the "Pam 6.0", and Dwight considering her to be the ideal woman . Michael and Dwight each make a move on her; Michael flirts with her aggressively, and Dwight shows interest in purchasing a handbag . However, she ignores their advances, and begins dating Jim, a relationship that only lasted for a few months . After Pam and Roy decide to set a date for their wedding, a devastated Jim breaks up with Katy in "Booze Cruise", when he ungraciously admits that the two will never be as deeply in love with each other as Roy and Pam seem to be when seeing them together . Along with Toby, Katy is a graduate of Bishop O'Hara High School, where she was a cheerleader . She bonds with Roy on the Booze Cruise, when they realize that they went to rival high schools, and she cheered at games against the football team Roy played on . </Li> </Ul> <Li> Gerald (Robert Pine) and Betsy Halpert (Perry Smith) are Jim's parents . In "Frame Toby", Jim purchases their house, where he grew up, for him and Pam to live in . They first appear on - screen in "Niagara", where they attend their son's wedding to Pam . During the ceremony, Gerald can be seen wearing a kilt . </Li> <Li> Thomas (Blake Robbins) and Peter Halpert (Tug Coker) are Jim's obnoxious older brothers who, like him, possess a great love for practical jokes . They first appear in "Employee Transfer", in which they have lunch with their brother and his fiancée . However, unbeknownst to Jim, Pam met with them before lunch to clue them in on a prank she would be playing on him, but Tom and Pete instead decided to make fun of her interest in art, as opposed to Pam's idea of losing her engagement ring . During lunch, they make numerous insults towards her art career, causing Jim to come to her defense . After the argument escalates, Tom and Pete reveal it to be a prank, with Pam awkwardly confirming this . Afterward, Jim receives a text message from them welcoming Pam into the family, and Pam suggests they should "prank" Tom about being bald over Thanksgiving . They later reappear in "Niagara", attending Jim and Pam's wedding, for which they (along with Michael and Dwight) organize to have everyone dance down the aisle in the style of the viral video, JK Wedding Entrance Dance . </Li>

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