Striking a pose at just four days old: Incredible photographs of the newborn baby MODELS

They may be just a few days old, but these babies have already mastered their perfect pose for the camera.
The newborns appear to be far from camera-shy as they happily stare into the lens or curl up for a nap just days after being born.
And looking snug as they sleep in giant blankets, the stars of these photos are guaranteed to make your heart melt.

Pulling the perfect pose: Spring baby girl Crystal rests on a fluffy pillow while having her picture taken in Philadelphia, Pennsylvania

Diving in feet first: Spring baby girl Gianna, six days old, from Conshohocken, puts her best foot forward for this cute snap

In the spotlight: Gianna, six days old, from Conshohocken, is one of hundreds of babies to be photographed by Dan Cuellar and Heidi Belle

Strike a pose: Spring baby boy Lev, 14 days old, from Redwood City in California, curls up for the camera

These photos of four to ten-day-olds were all captured by newborn portrait photographers Dan Cuellar and Heidi Belle, from Philadelphia, Pennsylvania.
The pair have photographed hundreds of tots since they started their business in 2008. Each session takes between 30 minutes and four hours.  
Dan and Heidi say they have been inundated with requests from parents to have their spring babies photographed.
Dan, 30, said: 'Spring is usually a really busy season for us. At this time of year we get lots of requests from parents.'

Time for a nap: Baby Gianna, from Conshohocken, rests on a fluffy pillow as she has her photo taken aged just six days old

Snug as a bug in a rug: 10-days-old Genevieve, from Sellersville, takes a bit of time out from posing for the camera

Double act: Spring baby boy Lev, 14 days old, from Redwood City in California, pictured left, and baby girl Gianna, six days old, from Conshohocken, pictured right

Here's looking you kid: Baby girl Gianna boldly stares at the camera with her big blue eyes

Sleepyhead: Adorable Genevieve, 10 days old, from Sellersville, smiles as she curls up on a pink blanket

He added: 'You can’t really just ask a baby to do something.

'The trick to photographing newborns is really just waiting, keeping them warm and full.

'Once they are in a deep sleep you can pose them without waking them. You need to have a lot of patience and be willing to wait for the right moment.

'The age of the child is also very important. It’s usually best to photograph them when they are under two weeks old. 

'The first 10 days are best for getting the cute curly poses and longer amounts of deep sleep to pose and style them.

'After 10 days of age, they are more likely to be disturbed while sleeping.'

Relaxed: Gianna, six days old, from Conshohocken, proves to be perfect model material

Baby boy blue: Spring baby boy Mason, just 12 days old, from Somerdale in New Jersey, snuggles up on a pillow for a nap in Philadelphia, Pennsylvania

Just chilling out: Baby girl Natalie, 12 days old, from Cherry Hill in New Jersey, is pictured having a quick nap in Philadelphia, Pennsylvania

Cute as a button: Spring baby boy Mason, 12 days old, from Somerdale in New Jersey, pictured left, and spring baby girl Gianna, six days old, from Conshohocken, pictured right

Baby blues: Gianna looks into the camera as Dan Cuellar takes her picture

Deep sleep: Baby boy Mason, 12 days old, from Somerdale in New Jersey, is out for the count

Rockabye baby: Gianna, six days old, from Conshohocken, is the perfect age for being photographed while asleep