CHICAGO (WLS) -- The woman known as the "Serial Stowaway" pleads guilty in court Thursday morning.
Marilyn Hartman has been caught multiple times sneaking on flights at Chicago's airports.
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The 69-year-old was awaiting sentencing and nearing a plea agreement when she was arrested again in March of last year.
RELATED: 'Serial stowaway' Marilyn Hartman arrested again at Chicago's O'Hare International Airport
During Thursday's hearing, Hartman apologized for actions and said she's looking for ways to correct her behavior.
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She pleaded guilty to criminal trespass to a restricted area and escape.
Hartman remains behind bars.