This is from A Little Night Music and has become a very popular standard. I thought since Philomena is opening soon we sould celebrate Dame Judi Dench. This live performance is from the BBC celebration of Sondheim's 80th birthday and Judi aces it. She of course famously played the part of Desiree in a celebrated 1995 revival in London for which she won the Olivier.
Sondheim fans is this one of your fave songs? It is absolutely a fave of mine.