What was Lucille first television appearance?

It seems you're asking about Lucille Ball, the iconic American comedian and actress.

Lucille Ball's first television appearance was on October 29, 1949, on "The Philco Television Playhouse". She starred in a segment called "The Big City" playing the character "Miss Jane Doe".

This appearance was a pivotal moment in her career, paving the way for her iconic role in "I Love Lucy" which would soon follow.