Are Josh And Cristin Dating?
Josh Radnor and Cristin Milioti dated in reel life but not real life. They didn't fall in love with each other off-screen.
Josh and Cristin worked as co-stars in the CBS sitcom How I Met Your Mother, where they played Ted Mosby and Tracy McConnell. The sitcom aired in 2005 and ended in 2014, lasting nine years.
Mosby is a 27-year-old architect living in New York City at the beginning of HIMYM. The fictional character was born on the 25th of April 1978, and he graduated from Wesleyan University.

Likewise, McConnell was born on the 19th of September, 1984. Her late boyfriend left her a Ukulele, and she also became a band member who played bass guitar. Her name only got confirmed in the series finals, and she was also an unseen character for some period (from Lucky Penny to The Time Travelers).
The story revolves around Ted sharing his love life as a single man with his children, Luke and Penny. He shared his journey with his four friends, eventually leading him to meet their mother through flashbacks.
The protagonist met the mother of Luke and Penny at the Farhampton train station following his friend's wedding (Barney Stinson and Robin Scherbatsky). They went on their first date in the episode Gary Blauman, and he proposed to his future wife in ep The Lighthouse.