Not every celebrity goes by the name on their birth certificate (what, you didn't know Lady Gaga [1] wasn't born that way?), but some stage names are definitely more obvious than others. There are a handful of stars who have been using their middle names [2] throughout their careers, and you probably didn't even realize it! Whether they're using it as their first name or their last [3], we've rounded up over 30 stars who you may be surprised to learn have been low-key lying to you this whole time — scroll through to see them all now.

Casey Affleck = Caleb Casey McGuire Affleck

Mindy Kaling = Vera Mindy Chokalingam

Ryan Phillippe = Matthew Ryan Phillippe

Lea Michele = Lea Michele Sarfati

Jude Law = David Jude Heyworth Law

Angelina Jolie = Angelina Jolie Voight

Brad Pitt = William Bradley Pitt

Jason Momoa = Joseph Jason Namakaeha Momoa

Ashton Kutcher = Christopher Ashton Kutcher

Rihanna = Robyn Rihanna Fenty

Reese Witherspoon = Laura Jeanne Reese Witherspoon

Téa Leoni = Elizabeth Téa Pantaleoni

Keke Palmer = Lauren Keyana Palmer

Drake = Aubrey Drake Graham

Theo James = Theodore Peter James Kinnaird Taptiklis

Kevin Spacey = Kevin Spacey Fowler

Bruce Willis = Walter Bruce Willis

Aaron Paul = Aaron Paul Sturtevant

Tina Fey = Elizabeth Stamatina Fey

Zachary Levi = Zachary Levi Pugh

Lucy Hale = Karen Lucille Hale

Jonah Hill = Jonah Hill Feldstein

Faith Hill = Audrey Faith Perry

Tim McGraw = Samuel Timothy McGraw

Dakota Fanning = Hannah Dakota Fanning

Elle Fanning = Mary Elle Fanning

Skylar Astin = Skylar Astin Lipstein

Rooney Mara = Patricia Rooney Mara

Norah Jones = Geetali Norah Jones Shankar

Marie Osmond = Olive Marie Osmond

Paul McCartney = James Paul McCartney

Garth Brooks = Troyal Garth Brooks

Tom Cruise = Thomas Cruise Mapother IV

Will Ferrell = John William Ferrell

Tom Hardy = Edward Thomas Hardy