Suggestions by @rishitchakraborty

Karan Singh Grover

as Bali in Ramayana

Prakash Raj

as Kumbhakarna in Ramayana

Manoj Bajpayee

as Jambhavan in Ramayana

Aishwarya Rai Bachchan

as Mandodari in Ramayana

Pritam Chakraborty

as Composer in Ramayana

Nawazuddin Siddiqui

as Vibhishana in Ramayana

John Abraham

as Sugriv in Ramayana

Sharad Kelkar

as Bali in Ramayana

Vicky Kaushal

as Indrajeet in Ramayana

Amitabh Bachchan

as Dashrath in Ramayana

Arjun Kapoor

as Kumbh in Ramayana

John Abraham

as Bali in Ramayana

Shankar–Ehsaan–Loy

as Composer in Ramayana

Hrithik Roshan

as Shree Ram in Ramayana

Karan Singh Grover

as Shree Hanumam in Ramayana

Bong Joon Ho

as Director in Fantastic Beasts: the son of Grindelwald

Alan Galifianakis

as Hagrid in Harry Potter

Daisy Edgar-Jones

as Hermione Granger in Harry Potter