"Listen to my voice. It's deep. It's sexy. It's got a tinge of ... physics," says Liam Neeson. And yes, he even does a little bit of his Taken routine but Dr Hawking remains unimpressed.
Australian singer Kylie Minogue tries to bag the job by claiming her songs are about science. "Spinning Around is about centrifugal force," she says, rather unconvincingly. Nice try, Kylie.
Actor Eddie Redmayne, who won an Oscar for his portrayal of Dr Hawking in the 2014 critically-acclaimed film The Theory of Everything, seems annoyed he even has to audition for the part. Surely he's a shoo in for the "sequel?" Not a chance, Redmayne.
At least one person thinks the audition process is pointless. "Why change? Your voice super sexy and cool," Apple's voice-controlled personal assistant Siri tells Dr Hawking.
Watch the hilarious comedy sketch here:
Looks like Dr Hawking's final choice is legendary British actor Michael Caine. Well done, sir.
Dr Hawking has a rare form of Amyotrophic Lateral Sclerosis (ALS), also known as Motor Neurone Disease. It has gradually paralysed him over the years. He communicates using a computer-based system. His distinctive computerised voice is instantly recognisable.
Click here for more trending stories.
Get Breaking news, live coverage, and Latest News from India and around the world on NDTV.com. Catch all the Live TV action on NDTV 24x7 and NDTV India. Like us on Facebook or follow us on Twitter and Instagram for latest news and live news updates.