Stepping out for a sisterly sweat session, Hilary and Haylie Duff were spotted leaving a West Hollywood, California gym together on Wednesday morning (July 28).

The celebrity siblings looked to have had a great workout with the help of their personal trainer, as they emerged looking a bit worn out and chugging water to rehydrate.

With her nuptials to Mike Comrie approaching (although no date has been announced yet), Hilary has really kicked her exercise routine into high gear – as she has been photographed leaving the gym on just about a daily basis.

In related news, the engaged couple purchased a “starter” home last month. They settled for a five-bedroon, five-bath Georgian Colonial home in Studio City, CA for $3.85 million. Congratulations!