Theo James and Rose Leslie were both on the TV show Downton Abbey. Leslie played Gwen a maid who ended up leaving to become a secretary and James played Kamal Pamuk the son of a Turkish Diplomat who causes a scandal by dying in the bed of the Earl's eldest daughter.
One of the dates in the notebook of dates Claire keeps for the days Claire meets Henry mentions that they saw each other on September 11, 2001.
The series received a generally negative reception, and was canceled after one season in July 2022. The fans of the show started a petition to save the series by approaching other streaming platforms to pick it up for renewal. It was removed from HBO Max in December 2022.
The novel begins with the couple meeting at the library in 1991. Henry was 28, putting his birth in about 1963. The series mentions years but it appears to have moved the meeting to about 2008. This would put Henry's birth year in 1980. He was eight when his mother died. Henry's mother is on a cell phone after he saw her at the mall when she called his school. Either time line, cell phones were not mainstream in the late 1980's or 1970's. What's even funnier is that nobody has cell phones when Claire is an adult.
Eric Bana and Rachel McAdams starred in the movie adaption in 2009.