Open mouth for the best photograph: Blake Lively

Actress Blake Lively says opening your mouth is key to taking a perfect photograph.

The 27-year-old, who is married to 38-year-old actor Ryan Reynolds shared her top tip for taking an attractive-looking picture, reports femalefirst.co.uk.

Writing on photo-sharing website Instagram, Lively explained: "Tip: open your mouth when you smile - like you're having the time of your life - when you're, in fact, terrified you're going to break your ankle because of what an epic-ly uncoordinated person you are. I are. Am. I am ... but we're not talking about me. Of course. This is just a random tip. (sic)"

Meanwhile, Lively recently joked that having a baby is "like living with a drug addict".

"Having a baby is just living in the constant unexpected. You never know when you're gonna get crapped on or when you're gonna get a big smile or when that smile immediately turns into hysterics. It might be like living with a drug addict," she said.