Eight years have passed since the events of Au Pair, and newly graduated as his high school's valedictorian, Alexander Caldwell joins his visiting sister, college freshman Katie and her roommate Ariana on a family summer vacation with father Oliver and stepmother Jenny. Oliver and Jenny's current nanny declines to join them and the over-worked parents/executives must take care of their newborn baby Sarah in Puerto Rico.
Amidst corporate scheming by the young company CFO Walter Hausen, who is planning a takeover of Oliver's company CCI Tekhausen (formed in Au Pair II), Oliver and Jenny must contend with bridging the generation gap with the family, new career motivations and the romances of their 'newly reformed' prankster kids.
Gerrit Graham as Rupert, the brother of Oliver's now-retired chauffeur Nigel
Kathleen Mealia as Ariana
Ciaran Tyrrell as Danny Taylor
Bradley White as Walter Hausen
Brian Tester as Brentfield Academy Headmaster
Rafa Alvarez as Bodyguard 2
Series continuity
Oliver mentions Walter Hausen's father with great respect (Karl Hausen), but Walter was not present during the events of Au Pair II. Walter may be Brigitte's (Au Pair II) father, but this is never established during this film.
Au Pair 3 is also the only one without Haim Saban and his wife, Cheryl Saban, who wrote the script for the first two films. However, the other screenwriters remain, as does the director, Mark Griffiths. According to Gregory Harrison's official site, the filming was done in April and May.[2] The synopsis is now available on ABC Family.[3]