Steve Smith's reaction to Mitchell Marsh's century is the best thing in the Ashes so far

New Delhi, Delhi, India

Australian skipper Steve Smith gave one of the hilarious moments of the summer by screaming in panic at Shaun and Mitchell Marsh to get back in their creases.

Marsh hit a ball punched a drive through cover off to bring up his second Test match hundred on day four at the Sydney Cricket Ground.

During a second run, Mitch grabbed Shaun for a mid-pitch hug, forgetting that completing the run and reaching their respective crease was required

But, it was the response of captain Smith that stole the show for viewers.

Smith sitting with teammates in the stands, rose for a standing ovation for Mitch, before going blank in the face as the potential for a run out became clear.

The worried Smith had put his hands on his head and appeared to mouth something as teammates around laughed hysterically at their animated captain.

Social media went into overdrive after Smith's footage became viral, with many agreeing it was a classic moment of the summer.