Colleen Anne Lanné[a] (born August 18, 1979), also known by her married name as Colleen Lanne Cox is an American former competition swimmer for the University of Texas who represented the United States in the Olympics, FINA world championships and Pan American Games.

The Hildenbrand Team trained at the University of Arizona Hilldenbrand Aquatics Center, a premier facility.

[3] One of her first major tournaments was in August 1994 when she swam in the Phillips 66 National Swimming Championship in Indianapolis after recording a qualifying time of 23.9 in the 50 yard freestyle.

[10] While training for the 2004 Olympics, Lanné moved to Orange County and swam with the Irvine Novaquatics where she was managed by outstanding Coach Dave Salo, formerly with University of Southern California.

[13] She earned a silver medal at the 2004 Summer Olympics in Athens, by swimming for the second-place U.S. team in the preliminary heats of the women's 4×100-meter freestyle relay.

[14] After the Olympics, she married John Cox, a UCLA business school graduate whom she began dating around 2002.