The duo replaces Melanie Jones and Louise Broadfoot, both of whom were members of the 2005 World Cup winning squad.
The Southern Stars would play two Tests and five One-day Internationals and a Twenty20 fixture during the much-anticipated tour.
Australia will also play three One-dayers against Ireland before its series with England.
The team departs for England in late July.
It may be noted that Australia eves have not lost a Ashes Series since 1963 and last retained the coveted trophy in 2002-03 with a 1-0 victory on home soil.
Squad: Belinda Clark (capt), Karen Rolton (vc), Alex Blackwell, Kate Blackwell, Sarah Edwards, Cathryn Fitzpatrick, Julie Hayes, Lisa Keightley, Emma Liddell, Shelley Nitschke, Kirsten Pike, Julia Price, Clea Smith, Lisa Sthalekar.