'Bachelorette' Star Kasey Kahl — Arrested for Being a Drunken Mess [Mug Shot]

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Bachelorette” star Kasey Kahl was arrested Sunday morning in Fresno, CA — hometown of Kevin Federline — after cops say he was drunk and disorderly at a nightclub … has learned.

Law enforcement sources tell … Kahl — who recently appeared on “Bachelor Pad” — was allegedly involved in an incident at a place called Club Habanos. So far, it”s unclear exactly what Kahl is accused of doing wrong.

Kahl was booked at a nearby police station — where he took one of the prettiest mug shots we”ve ever seen and was released a few hours later.

Kahl just finished taping the inaugural season of VH1″s upcoming “Relationship Rehab” with former GF Vienna Girardi

Calls to Kahl”s rep have not been returned.