Katharine McPhee @ LAX Airport

Katharine McPhee and unconfirmed fiance Nick Cokas arrive at LAX airport in Los Angeles on Saturday.

The American Idol alum kept it really casual in a pair of Nike sneakers and carried a bag full of goodies from the Disney store.

Kat, 23, and Nick, 42, were first rumored to be engaged back in September. People Magazine confirmed the same thing in November but no official word about their engagement has been released by the couple.