<Li> Bonnie N. Walker (née Prapinski; previously Wheeler) (Melissa Peterman): Ben and Danny's mother . She is a happy, outgoing, loud, and dramatic person who has a kind heart . Bonnie loves her kids and her granddaughter more than anything . She loves to drink; her favorite wine is chardonnay . It is hinted many times throughout the series that Bonnie might have a drinking problem . Bonnie has an on and off relationship with Brad Walker since season 3 . She later marries Brad in an elevator . She had originally wanted to be a model but those plans changed after having Danny . She later became a realtor . Bonnie is in love with Bon Jovi, so much so that she named her second son "Benjamin Bon Jovi Wheeler". She describes herself as "a beautiful young woman with goals and ambitions ." </Li> <Li> Riley Perrin (Chelsea Kane): Ben's close friend and Danny's best friend since they were little . Although Riley dates Ben on and off during the first few seasons of the show, she falls for Danny towards the end of Season 4, and subsequently begin a relationship with him . During the Season 5 season finale, it is revealed that Riley is pregnant . Danny and Riley get married in Season 6, and she gives birth to their son in the series finale . It has been said that she was extremely overweight in high school and, in the season 3 episode "Romancing the Phone" she says she lost 90 pounds . When they were kids, her nickname was "Rigantor" and could beat up the boys, enjoyed watching professional wrestling with Danny, and played field hockey as well as street hockey . She is highly intelligent . Despite having some difficulty with the LSATs, she did well enough to get accepted into law school . Riley is also extremely competitive . She has liked Ben ever since they were young, but only Danny initially knew . In the episode "Send in the Clowns", it is revealed that her aunt was her real mother . In the episode "House of Cards," she mentions a sister, presumably her cousin in reality, whom she claims to "hate". </Li> <Li> Emma Wheeler (Ali Louise and Susanne Allan Hartman in season 1; Mila and Zoey Beske in season 2; Ember and Harper Husak in season 3; Sura and Kayleigh Harris in seasons 4--6): Ben's daughter, who was left at his door by a one night stand . Angela, Emma's mother, and Ben went on with their lives until she realized she was pregnant and gave birth to the child . Deciding that her acting career was more important than raising a child, she left Emma at Ben's front door and gave him full custody of Emma . </Li> <Ul> <Li> Brad Walker (Peter Porte): A handsome real estate agent who had an on and off relationship with Bonnie since season 3 . He had a twin brother named Tad . On the season 4 episode "Parental Guidance", Brad proposed to Bonnie, with her saying yes . Brad and Bonnie officially got married in season 5 . </Li> <Li> Dr. Amy Shaw (Lacey Chabert): A psychologist for the New York Rangers and Danny's girlfriend in season 2 . She cares deeply for Danny but is constantly worried his feelings for Riley will drive him away . She eventually realizes Danny still has feelings for Riley and breaks up with him in the episode "Surprise!". In season 3, Amy shows up and announces that she is engaged to another man . </Li> <Li> Fitch Douglas (Matt Dallas): Son of a millionaire and Riley's boyfriend in season 2 . Fitch does not speak to his family for he feels their money corrupts them . He constantly travels to Africa to help the children and orphanages, having a long distance relationship with Riley . He is seemingly killed in Africa but later turns up alive at his memorial and proposes to Riley . She regretfully declines claiming she is not the one for him . In season 3, he comes back and Riley attempts to make him her rebound to forget Ben . </Li> <Li> Philip Farlow (Christopher O'Shea): A college professor whom Riley briefly dated in season 3 . </Li> <Li> Georgie Farlow (Mallory Jansen): Philip's sister who briefly dated Ben, but later developed feelings for Danny in season 3 . She is a fashion photographer for Vogue magazine . She doesn't like Riley, but begins to accept her for Danny's sake in the episode "Foos it or Lose It". She breaks up with Danny via voicemail at the beginning of season 4 . </Li> <Li> Angela (Mimi Gianopulos): The mother of Emma and the ex-girlfriend of Ben . When her daughter was 3 months old, she abandoned her on Ben's doorstep . She's an aspiring actress who had since moved to California . Although she appears in several episodes, Angela never took the role of Emma's mother as she would often place her career first . </Li> <Li> Megan (Grace Phipps): A day care worker whom Ben dated in season 2 . She broke up with him after he almost lost her dog . </Li> <Li> Ray Wheeler (Greg Grunberg): Ben and Danny's father . He is divorced from Bonnie and doesn't get along with her . He makes amends with Bonnie by finally telling his family that he's in a relationship with a man named Steve (Robert Gant). </Li> <Li> Sondra (Rachna Khatau): A neighbor who's known for her talkativeness and distinctive high - pitched voice . </Li> <Li> Robyn (Christa B. Allen): Riley's co worker and Danny's girlfriend in season 4 . </Li> <Li> Zoey (Jonna Walsh): A single mother living in the same building as Ben, introduced in season 5 . She shares the same interests as Ben, but is reluctant to give in to her romantic feelings because of Ben's immaturity . </Li> <Li> Sam Saffe (Daniella Monet): The manager of the Bar on B in season 5 . She went to highschool with Ben, Danny and Riley . Ben had a crush on her in high school but she never reciprocated his feelings . She and Riley did not like each other, despite frequent attempts in both ends to become friends . Sam briefly dates Ben in season 5 . </Li> <Li> Elle (Katie Gill): A woman that Ben has met a few brief times and is convinced is his soulmate . </Li> <Li> Carter (Jase Whitaker): Ben's bartender co-worker at the bar Ben eventually ends up owning . </Li> </Ul>

Who played emma on baby daddy season 6