In Mumbai, Sienna Miller teamed up with Bollywood star Amitabh Bachchan on Tuesday to urge Indians to do more to slow global warming. The 25-year-old actress met Bachchan in Mumbai at the start of a weeklong trip to India as an ambassador for Global Cool.

"If each one of us does our bit, we will be helping to keep global warming from harming our countries," Miller said. Well Sienna's rather 'hot' herself so perhaps Amitabh Bachchan needed to "Cool Down" apres that rendezvous.

Sienna Miller Urges Indians To Help Stop Global Warming.