VINCENT KARTHEISER AND ALEXIS BLEDEL
Mad Men fans will know that Vincent Kartheiser and Alexis Bledel met when she made an guest appearance on the show, and apparently all kinds of sparks flew because they started dating five months after filming. "We were completely professional," Vincent said of working with Alexis. "We never saw each other out. We never — it was nothing, it was just work." The pair got married in 2014 and just welcomed their first child.
ASHTON KUTCHER AND MILA KUNIS
Ashton and Mila met on the set of That '70s Show, and married years later in 2015. "My first real kiss ever was with him on the show," Kunis said of dating her costar. "And when That '70s Show had a prom, my date for the prom turned out to be my fiancé. We can honestly say that we went to prom together!"
HUMPHREY BOGART AND LAUREN BACALL
Humphrey Bogart and Lauren Bacall famously met on the set of To Have and Have Not in 1943 when she was just 19 and he was 44. Apparently, the age difference mattered approximately zero, because they got married two years later and had a couple kids. “He was standing behind me — we were joking as usual — when suddenly he leaned over, put his hand under my chin and kissed me,” Bacall wrote of their first lip-lock. “It was impulsive — he was a bit shy — no lunging wolf tactics. He took a worn package of matches out of his pocket and asked me to put my phone number on the back. I did.”
CLAIRE DANES AND HUGH DANCY
Claire and Hugh married in 2009 after meeting on the set of 2007's Evening. They aren't super open about their relationship, but their co-star, Mamie Gummer said, "I was there when it was happening and it's something that I will never forget. I'm incredibly happy for them. They are perfect for each other."
BLAKE LIVELY AND RYAN REYNOLDS
Blake and Ryan met on set of 2010's Green Lantern and became fast friends. These two took their relationship to the next level once they were both single, but here's the catch: they were on a double date with other people! "About a year after Green Lantern had come and gone and we were both single we went on a double date — she was on a date with another guy and I was on a date with another girl — and it was like the most awkward date for the respective parties because we were just like fireworks coming across," Ryan said. "It was weird at first, but we were buddies for a long time. I think it's the best way to have a relationship is to start as friends."