Lacey Schwimmer is excited to have Chaz Bono as a dancing partner

The fourth place finalist of the third season (2007-2008) of "So You Think You Can Dance," Lacey Schwimmer says she is very excited to be a partner of Chaz Bono for this fall's thirteenth edition of "Dancing with the Stars."

This 23-year-old American competitive ballroom dancer, singer, and the winner of multiple youth championships  tweeted Wednesday afternoon, "I'm so thrilled to let you know my dance partner on [Dancing with the Stars] is [Chaz Bono]!! He is such an amazing person! And so sweet! Weee!"  "He has been working so hard this past week! Such a beautiful person inside and out!" she added about the transgender advocate, who was born Chastity Bono to entertainers Sonny and Cher but underwent a sex change in 2009 and legally became a man last year. 

This 42-year-old is the first transgender person to compete on the ABC reality ballroom dancing competition. She said during a Wednesday appearance on Ryan Seacrest's On Air with Ryan Seacrest radio show, 

Cher Bono

"[Lacey] really thought it was great that I was doing it and wanted to know how I was feeling about it -- if I was nervous and how it was going." She added, "We met last week and just kind of instantly hit it off... she's just great. I was so nervous going into it about who my partner was going to be -- you have no idea until you meet them -- and I was really relieved that it was Lacey... I just dig her... she has a great attitude for teaching me." 

The "Dancing with the Stars' thirteenth season is going to premiere on September 19, 2011 at 8PM.

Lacey Schwimmer in "So You Think You Can Dance"