Allison Rosati was born in Dover, Delaware and grew up in Pine City, Minnesota. Rosati is of Finnish (paternal) and Italian (maternal) descent. In 1980, She is crowned as Minnesota Junior Miss but a year later in 1981, she was repensented the State of Minnesota in the 1981 America’s Junior Miss pageant, she’s receiving a ‘Spirit of Junior Miss’ award alongside Idaho Junior Miss Kelly Jo Kreisher. She attended Gustavus Adolphus College where she studied speech and communications. She is also the member of the school’s choral group The Lucia Singers in 1981. She graduated in 1985 and received cum laude.
Rosati started her career in Rochester, Minnesota in 1985. KTTC-TV hired her as a general assignment reporter and less than a year later, promoted her to producer and co-anchor of the 6 p.m. and 10 p.m. newscasts. Rosati later went to WGRZ-TV in Buffalo, New York and anchored the 6 p.m. and 11 p.m. newscasts at WGRZ. Rosati also did general assignment reporting. In 1989, She was the local co-host of The Jerry Lewis MDA Labor Day Telethon 1989 alongside Barry Lillis. She was host of First Thing in the Morning when she first came to WMAQ in 1990. During her morning tenure, Rosati co-hosted “Chicago Live” along with Warner Saunders from 1991 to 1992. Five years later in 1995, she began anchoring the early evening news. And in May 1997 following the controversial hiring of Jerry Springer as commentator and the resignations of Ron Magers and Carol Marin, Rosati was promoted to co-anchor of NBC 5’s 10 p.m. newscast. In August 1998, Rosati dropped from their Early Evening Newscast in order to concentrate on its short-lived hourlong daytime program NBC 5 Chicago Daytime alongside Nesita Kwan and Byron Miranda, but later they canceled it in 1999 due to low ratings. In April 1999, Rosati was promoted to co-anchor of NBC 5’s 6 p.m. newscast after Joan Esposito left the station. In addition, Rosati also hosted the weekly segment Wednesday’s Child from its inception in 1999 until their final report in 2005. In 2000, she was named host, co-creator and co-executive producer of half-hour special series MomTV. Later in September 2006, Rosati and Saunders were promoted to anchors of 5 p.m. newscast, displacing Bob Sirott and Marion Brooks which still anchoring the 4 p.m (later 4:30) newscasts and for a short time during the football season of 2006, Rosati and Saunders anchored the 10 p.m. Sunday Newscast. After Saunders’ retirement in 2009, Rob Stafford was selected Rosati’s co-anchor in the NBC 5 evening newscasts.