"So already he has won three matches here, playing again at a very high level".
Seeded third behind only Rafael Nadal and defending champion Roger Federer, Dimitrov arrived at Melbourne Park as the challenger considered most likely to break the legendary duo's year-long domination of grand slam tennis.
He is the second Hollywood personality at the Australian Open this week.
Kyrgios goes on to face Bulgarian third seed Grigor Dimitrov in the last 16.
Top seed Rafa Nadal continued his marauding path through the Australian Open, hammering Argentine Leonardo Mayer 6-3, 6-4, 7-6 (4) to reach the third round on Wednesday.
The temperamental Australian won three tight tie-breakers against Frenchman Jo-Wilfried Tsonga 7-6 (7-5), 4-6, 7-6 (8-6), 7-6 (7-5) to advance.
15-year-old Marta Kostyuk lost to Elina Svitolina 6-2, 6-2, ending her run, but she didn't seem shaken by the loss.
A rash of upsets depleted the bottom half of the women's draw on Monday but second seed Caroline Wozniacki survived and will pursue her quest for a maiden grand slam title against Croatian Jana Fett.
Dylan Farrow on Woody Allen abuse claims: 'I am telling the truth'
However, CBS released a preview of the interview on Wednesday, in which Dylan stressed the validity of her allegations. You can read the full list of people who have spoken out here .
Andreas Seppi overcame Ivo Karlovic in a five-set contest that lasted nearly four hours, with the Italian eventually winning 6-3, 7-6 (4), 6-7 (3), 6-7 (5), 9-7.
"How much (do) you have to pay Svitolina to have a one-hour lesson - I got it for free", Kostyuk joked. Edmund also had a five-set win Friday, beating Nikoloz Basilashvili in 3 hours, 34 minutes.
"Playing Jo, I was obviously very nervous, he was a guy I looked up to as a kid, still do", said Kyrgios, per the AP.
"She was hitting the ball really hard", said seventh seeded Ostapenko.
Another Ukrainian, Kateryna Bondarenko, beat No 15-seeded Anastasia Pavlyuchenkova 6-2, 6-3 and will next play No. 19 Magdalena Rybarikova.
Her reward is a match against Belgium's Elise Mertens, who beat struggling Alize Cornet of France in two tough sets.
Denisa Allertova, Czech Republic, def. Zhang Shuai, China, 6-4, 7-6 (5).
Belinda Bencic had a letdown two days after upsetting Venus Williams, losing 6-1, 6-3 to Thai qualifier Luksika Kumkhum.