WWE Hall of Famer "Stone Cold" Steve Austin and CM Punk were both in attendance at UFC 170 on Saturday night in Las Vegas. Austin was shown on camera during the PPV and is featured in a photo gallery by the UFC on Facebook at this link.
CM Punk was spotted sitting cageside next to UFC President Dana White. Punk was only mentioned on the broadcast at the end of the night by Joe Rogan when discussing the early stoppage of the Ronda Rousey vs. Sara McMann main event and how Rogan looked over at Punk who gave him a thumbs up about it being a good stoppage.
Source: UFC on Facebook