K.C. Undercover Wiki
Study, bad. Party, good!
—Marisa to K.C.

Marisa Clarissa Miller is one of the two deuteragonists of K.C. Undercover. She is K.C. Cooper's best friend.

She is portrayed by Veronica Dunne.


Unique and outgoing Marisa is K.C.'s trusted best friend who is always in the know about fashion, parties, and cute boys.[1]


Marisa is very alive and perky. She enjoys parties, life, and boys. Although she cares a lot for her looks and cute boys, she is always there and loyal to K.C. She doesn't invest much in school; she is known for failing classes and getting into trouble, and she regularly gets detention. She often acts very dimwitted, however, she is actually quite clever, though due to her personality and priorities she rarely exhibits that. Marisa enjoys wearing beautiful dresses and looking gorgeous but that is sometimes turned into vanity which can sometimes get her into trouble as seen when she kept spending money on new dresses and outfits and couldn't keep her mother's credit card from buying a lot of outfits and even dumped someone because she said that if someone can't appreciate how much effort she puts into looking beautiful than it's not worth it. Even so, she's not shallow because Adam said she looked better in overalls than she did in her regular clothes, which is why she dumped him.

Character History

In "Pilot" Marisa tries to convince K.C. to go to the school dance but fails in doing so. Later, since K.C. needs to take Lincoln to the dance, she texts Marisa in what she needs to wear and she flies in with a bunch of dresses, happy for K.C. Later at the dance, Marisa walks in on K.C. and Lincoln and winks at them, and walks away with the boy she was pulling around.

In "My Sister from Another Mother... Board" Marisa starts a gossip blog in the school's newspaper titled "Just Sayin". She hides in the girl's bathroom and pretends to be prepping herself for 30 minutes, but fails. She wants to give up the column, but K.C. gives her advice not to. She gives up the column anyways.

In "Photo Bombed" Marisa revealed to be the finalist of a photo contest where she took a photo of K.C. hoping for it to win. However, Craig told K.C. to get rid of the photo in order to keep her secret safe, believing some crooks could recognize her, but Marisa revealed to have more than one copy. Later, when she went to a sushi bar, she discovered K.C's secret of being a spy after seeing her take out two enemy spies, but due to The Organization rules, K.C. had to erase her memory with the memory spray. It was revealed that the spray was just perfume and Marisa now knows K.C. being a spy.

Physical Appearance

Marisa has beautiful long blonde hair and blue eyes. In school, she is known to be very attractive. She is often shown wearing skirts and dresses. She is incredibly beautiful.

Other Relationships

K.C. Cooper

Main Article: K.C. and Marisa

K.C. is Marisa's best friend. She is always trying to convince K.C. to go to parties and be more social, like a normal teenager. She regularly asks to copy off K.C.'s homework and class notes. As of Photo Bombed, she knows that the Cooper family are spies. She is shown to know K.C. very well, as shown in Double Crossed Part 3 when she was the only one who figured out K.C. was in trouble.

Ernie Cooper

Ernie is Marisa's best friend's brother. They are shown to be on friendly terms with each other, though not much is known about their friendship. In K.C. and Brett: The Final Chapter - Part 2, he had saved Marisa when they were getting attacked and Marisa said that he looked cute. Ernie is shown to have a crush on Marisa and it is possible that she returns his feelings. She starts to fall in love with him too, only temporarily since this is never brought up again in later seasons. In Twin it to Win it, Marisa and Ernie accidentally kiss three times, and they each run off screaming.


Main Article: Brady and Marisa

Marisa first met Brady when he tricked her into betraying K.C. by joining The Alternate. After several betrayals, Marisa eventually finds out about his true intentions in The Truth Will Set You Free. When Brady was turned to The Organization, it was revealed that they have true feelings for one another as Brady was happy for her when she got accepted into FIT. As of the series finale, they are still dating.


Study, bad. Party, good!
—Marisa to K.C.
You're leaving me again?!
—Marisa shouting to K.C. in a phone call
I was so bored, I read a book.
—Marisa to K.C.
What are you doing in my room?
—Marisa to Ernie



To view the Marisa Miller gallery, click here.


Main Characters
K.C. CooperMarisa MillerKira CooperCraig CooperErnie CooperJudy Cooper