Historical clue formulations

• Servant to Queen Amidala — 2019-02-09
• "Star Wars" droid ... or a phonetic hint to what's found in 17-, 26-, 41- and 52-Across — 2016-08-16
• He fell in love with a fire hydrant on "Sesame Street" — 2011-06-04
• Witness to Anakin Skywalker and Padmé Amidala's secret wedding — 2007-11-23