Tessa Thompson – Lady Disney, Columbia Tessa plays (the leading) Lady, a sweet and slightly spoiled cocker spaniel whose world is turned upside down when her family has a new baby. Justin Theroux – the Tramp Disney, @justintheroux / instagram.com Justin nails the voice of the Tramp, a street dog who seems like a bit of a player but secretly has a heart of gold. Sam Elliott – Trusty Disney, Warner Bros Iconic Western actor Sam Elliott voices Trusty, a retired police dog who looks out for Lady. Ashley Jensen – Jock Disney, Netflix In the original Lady and the Tramp, Jock was actually a male dog, but Jock's now a lady dog voiced by Scottish actor Ashley Jensen. Janelle Monáe – Peg Disney, @janellemonae / instagram.com Peg is a street dog voiced by Janelle Monáe, who perfectly brings to life her iconic pound performance of "He's a Tramp". Benedict Wong – Bull Disney, Marvel Benedict Wong is Bull, Peg's constant companion and fellow street dog who winds up at the pound. As for the human characters... Thomas Mann – Jim Dear Lady's human father, Jim Dear, is played by Thomas Mann, who you might recognise from Me and Earl and the Dying Girl. Kiersey Clemons – Darling Disney, Instagram: @kiersey / instagram.com Kiersey Clemons, most known for roles on Transparent and Angie Tribeca, plays Lady's sweet and caring human mother Darling. Yvette Nicole Brown – Aunt Sarah Disney, NBC Community star Yvette Nicole Brown plays Darling's aunt who dogsits Lady even though she's low-key evil and high-key hates dogs. Ken Jeong – the Doctor Disney, NBC Fellow Community alumni Ken Jeong has a brief cameo as the doctor who delivers Darling's baby and ushers in Lady's new life.