January
1- Verne Troyer: Griphook (1969)
4- Jim Norton: Mr. Mason (1938)
22- John Hurt: Mr. Ollivander (1940)
24- Terence Bayler: Bloody Baron (1930)
27- Richard Bremmer: voice of Voldemort (1953)

February
3- Warwick Davis: Professor Flitwick (1970)
8- John Williams: Composer (1932)
8- Roger Lloyd-Pack: Barty Crouch (1944)
10- Lance Johnson: visual effects intern for PoA (1982)
12- David Crossman: costume supervisor (1970)
17- Bonnie Wright: Ginny Weasley (1991)
18- Simon Emanuel: second assistant director; second unit (1975)
21- Alan Rickman: Professor Snape (1946)
22- Julie Walters: Molly Weasley (1950)
25- James and Oliver Phelps: Fred and George Weasley (1986)
27- Timothy Spall: Peter Pettigrew (1957)
28- Alfred Burke: Headmaster Armando Dippet (1918)

March
3- Miranda Richardson: Rita Skeeter (1958)
6- Pete Hanson: studio manager: Double Negative (1968)
13- Harry Melling: Dudley Dursley (1989)
15- Sean Biggerstaff: Oliver Wood (1983)
17- Ben Cooke: PoA stunts (1974)
20- David Thewlis: Remus Lupin (1963)
21- Gary Oldman: Sirius Black (1958)
22- Leilah Sutherland: Alicia Spinnet (1985)
27- Julian Glover: Voice of Aragog (1934)
28- Mike Newell: Director of Goblet of Fire (1942)
29- Brendan Gleeson: Mad-Eye Moody (1955)
30- Robbie Coltrane: Rubeus Hagrid (1950)

April
14- Julie Christie: Madam Rosmerta (1941)
15- Emma Watson: Hermione Granger (1990)
15- Emma Thompson: Professor Trelawney (1959)
18- David Tennant: Barty Crouch, Jr. (1971)
19- Tara Walker: digital i/o for CoS (1977)
20- Leslie Phillips: Voice of the Sorting Hat (1924)

May
5- Andrew Lockley: digital compositor for CoS (1971)
13- Robert Pattinson: Cedric Diggory (1986)
13- Zoe Wanamaker: Madame Hooch (1949)
17- Paul Whitehouse: Sir Caddogan (1958)
18- Alex Rodríguez: visual effects for PoA (1971)
18- Miriam Margolyes: Professor Sprout (1941)

June
6- Jason Isaacs: Lucius Malfoy (1963)
22- Chris Shaw: motion control previs supervisor (1975)
26- Tolga Safer: Karkaroff's Aide in GOF (1982)
27- Matthew Lewis: Neville Longbottom (1989)
30- Pedja Bjelac: Professor Igor Karkarof (1962)

July
2- Edward Randell: Justin Finch-Fletchley (1988)
10- Fiona Shaw: Petunia Dursley (1958)
10- Jeff Rawle: Amos Diggory (1951)
21- Adrian Rigby: prosthetic makeup and creatures assistant (1970)
21- Jamie Waylett: Vincent Crabbe (1989)
23- Daniel Radcliffe: Harry Potter (1989)
30- Frances de la Tour: Madame Maxime (1944)
31- J.K. Rowling (1965)
31- Richard Griffiths: Uncle Vernon (1947)

August
8- Katie Leung: Cho Chang (1988)
24- Rupert Grint: Ron Weasley (1988)
24- Stephen Fry: UK audio book narrarator (1957)
24- Jimmy Gardner: Ernie Prang (1924)
25- Marc Wolff: camera pilot (1947)

September
7- Hugh Mitchell: Colin Creevey (1989)
10- Chris Columbus: Director of first two films (1958)
18- Elizabeth Spriggs: The Fat Lady (1929)
22- Tom Felton: Draco Malfoy (1987)
23- Bruce Powell: digital artist and sequence supervisor (1967)

October
1- Richard Harris: Albus Dumbledore in first two films (1930-2002)
3- Christian Coulson: Tom Marvolo Riddle (1978)
4- Will Theakston: Marcus Flint in SS/PS(1984)
4- Martin Cantwell: sound effects editor (1963)
5- Tiana Benjamin: Angelina Johnson in GOF (1984)
7- Mark Radcliffe: Executive Producer for all films (1952)
8- Ian Hart: Professor Quirrel (1964)
11- Dawn French: The Fat Lady (1957)
19- Michael Gambon: Dumbledore in PoA (1940)
20- Veronica Clifford: Mrs. Mason (1944)
27- John Cleese: Nearly Headless Nick (1939)
27- Benjamin M. Esterson: special effects technician (1978)
27- Jamie Yeats: Marcus Flint in CoS (1983)
28- Devon Murray: Seamus Finnigan (1988)
29- Robert Hardy: Cornelius Fudge (1925)

November
8- Chris Rankin: Percy Weasley (1983)
28- Alfonso Cuarón: PoA director (1961)

December
2- Alfred Enoch: Dean Thomas (1988)
4- Gemma Jones: Madam Pomfrey (1942)
7- Aaron Cartwright: Stunt double (1987)
10- Richard Francis-Bruce: Editing (1948)
10- Kenneth Brannagh: Professor Gilderoy Lockhart (1960)
16- Tony Christian: stunt double for Rupert Grint, Slytherin Beater #3 (1975)
21- Martin Bayfield: Stunt Double for Robbie Coltrane, 13 year old Hagrid (1966)
22- Ralph Fiennes: Lord Voldemort (1962)
24- Nicola Berwick: PoA stunts (1978)
24- Shirley Henderson: Moaning Myrtle (1965)
28- Maggie Smith: Professor McGonagal (1934)