Katie Holmes Reveals Suri's Girly 5th Birthday Party Plans

By Dahvi Shira

04/04/2011 at 02:20 PM EDT

Mother knows best when it comes to planning the perfect celebration for Suri Cruise's birthday.

"This is my favorite day of the year, so we're going to have a little tea party," Katie Holmes told Ryan Seacrest on his KIIS-FM morning radio show on Monday.

Suri, who turns 5 on April 18, will have her wishes granted on her special day.

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"She wants a piñata, and wants her girlfriends to come over [for] some swimming," Holmes, 32, said. "And we're going to make a cake together."

No word on whether or not Suri's father, Tom Cruise, will take part in the planning process, but it sounds unlikely, considering Holmes says she plans to "girl it up" for the bash.