“You were an instrumental part of my life,” Milano’s tweet continued.

“You taught me to hold my head above the marsh!

You taught me to do anything for a laugh!

KATHERINE HELMOND

Credit: ABC Photo Archives/ABC via Getty Images

What an example you were!”

“We lost a national treasure,” Danza shared on social media.

“No words can measure my love.”

“I remember reading the script and thinking, ‘This is pretty good!

This is a good show,'“Helmond saidduring theWho’s the Boss?reunion.

“I looked forward to going to work every week.”

“Katherine Helmond is a joke machine.

You couldn’t find her in the gag reel ‘cause she never made a mistake,” Danza added.

“She was the sister I never had.

Those were the years I was running around Hollywood.

I got married, I had kids.

If I didn’t have her as a sounding board… She’s the most wonderful person ever.

She was a good influence on me.

She calmed me down and showed me what was important.”

Helmond issurvived by her husband, David Christian, whom she married 57 years ago.