Gossip

People are gossiping about his affair with the famous actress.

Merriam-Webster Online Dictionary
gossip (noun)
1.
a) dialect British - godparent
b) - companion crony
c) a person who habitually reveals personal or sensational facts about others
2.
a) rumor or report of an intimate nature
b) a chatty talk
c) the subject matter of gossip
gossip (verb)
intransitive verb
to relate gossip