Viall was 36 when he was the 'Bachelor' -- a full 10 years older than Underwood is now.
ET's Katie Krause chatted with Nick following his 'DWTS' return during Monday night's finale episode.
The former 'Bachelor' also opened up about Kaitlyn Bristowe's split from Shawn Booth.
The 'Dancing With the Stars' finale delivered a hilarious performance with 'Bachelor' alums, plus a sneak peek at Colton Underwood's se
ET has you celeb roundup from Nashville to Beverly Hills!
'The Bachelor' doesn't leave you the same way it found you.
Former Bachelors Nick Viall and Ben Higgins also expressed their concern for the new franchise lead.
ET spoke to the former 'Bachelors' at iHeart Radio, where they weighed in how the show affected them.
ET spoke with Higgins and fellow former 'Bachelor' Nick Viall at iHeart Radio in Las Vegas.
ET spoke with the former Bachelor, at the Paris x Boohoo official launch party, about his role in Ashley and Jared's engagement.
The 'Bachelor' alum also opens up about the engagement of Ashley Iaconetti and Jared Haibon.
File this under celeb friendships we didn't know existed.
"While the show does work for love, it doesn't work for me, unfortunately."
The former 'Bachelor' didn't hold back while chatting with ET.
