(CNN) -  Actor Seth Rogen spoke at a Senate hearing on Capitol
Hill Wednesday, addressing Alzheimer's disease and how it has
affected his wife's family.  Known for his roles in comedies
such as "Knocked Up," "Pineapple Express" and "Freaks and
Geeks," the actor brought some of his trademark humor to his
speech but didn't mince words when it came to discussing what he
called "the ugly truth" of the disease.  The hearing, called
"Taking a Toll on Families and the Economy: The Rising Cost of
Alzheimer's in America," gave Rogen a chance to speak about his
own experience with the disease, which afflicts his mother-in-
law. While Rogen said he initially thought of symptoms as being
little things like forgetting where you left your keys, he soon
saw what damage it could really do.  "My mother-in-law, a
teacher for 35 years, forgot how to speak, feed herself, dress
herself, and go to the bathroom herself, all by the age of 60,"
Rogen told the audience.  Rogen started a charity fund, Hilarity
for Charity, in 2012 to ra