VIDEO : 'The Flash' Star Grant Gustin Reveals Details Behind His Marriage Proposal

The Flash star Grant Gustin proposed to his his real-life love and things didn't go quite as planned.

During an appearance on Conan, Gustin revealed that scheduling issues messed up his original plans.

After storing the ring in the backpack that they were sharing, Gustin thought his girlfriend saw the ring.

"She was putting her phone away and the only backpack we had with us, and I'm an idiot and absent-minded as well on top of those other glowing things It was such an impromptu proposal and random moment that she thought I was joking actually when I proposed. It was obviously not a very good proposal. She laughed at first, but then she did say yes."