 Ben WhishawPaddington (voice) | Paddington (voice) |
 Hugh BonnevilleHenry Brown | Henry Brown |
 Sally HawkinsMary Brown | Mary Brown |
 Madeleine HarrisJudy Brown | Judy Brown |
 Samuel JoslinJonathan Brown | Jonathan Brown |
 Julie WaltersMrs. Bird | Mrs. Bird |
 Nicole KidmanMillicent | Millicent |
 Imelda StauntonAunt Lucy (voice) | Aunt Lucy (voice) |
 Peter CapaldiReginald Curry | Reginald Curry |
 Michael GambonUncle Pastuzo (voice) | Uncle Pastuzo (voice) |
 Jim BroadbentSamuel Gruber | Samuel Gruber |
 Madeleine WorrallAgatha Clyde | Agatha Clyde |
 Tim DownieMontgomery Clyde | Montgomery Clyde |
 Matt KingAndre the Thief | Andre the Thief |
 Simon FarnabyBarry | Barry |
 Kayvan NovakGrant | Grant |
 Matt LucasJoe | Joe |
| JJonathan DerbyshireMaster Gruber | Master Gruber |
 Mary RoscoeMaster Gruber's Aunt | Master Gruber's Aunt |
| JJude WrightTony | Tony |
| LLottie SteerYoung Millicent | Young Millicent |
 Alice LoweGeographers' Guild Receptionist | Geographers' Guild Receptionist |
 Will SmithGeographer (Present Day) | Geographer (Present Day) |
 Toby WilliamsGeographer (Present Day) | Geographer (Present Day) |
 Catherine ShepherdGeographer (Present Day) | Geographer (Present Day) |
| SSean BridgemanMorgan Clyde | Morgan Clyde |
 Cleo SylvestreMarjorie Clyde | Marjorie Clyde |
 Geoffrey PalmerHead Geographer | Head Geographer |
 Gus BrownSecond Geographer | Second Geographer |
 Rufus JonesThird Geographer | Third Geographer |
