Jamie Lynn Spears' baby - an artist's impression

Meet the youngest member of the Britney Spears clan!

This is an artist's impression of what Brit's pregnant sister Jamie Lynn and her boyfriend Casey Aldridge's baby might look like.

Using the most sophisticated computer software available, US artist D'Lynn Waldron has given fans a glimpse of the offspring of the young couple.

The artist imagined the child would have Spears' nose, chin, brows and head shape while it would also have Aldrich's 's mouth, eyes and colouring.

The 16-year-old star of Nickelodeon's Zoey 101 announced last month that she's expecting.

She said: "It was a shock for both of us, so unexpected. I was in shock and so was he.

"I can't say it was something I was planning but it's something I have to deal with and I'm looking forward to being the best mom I can be."

Britney was reportedly devastated that she was not told about the pregnancy.

As Jamie Lynn was announcing that she was already 19 weeks, Britney was telling reporters: "My sister is not pregnant."

Jamie Lynn has been dating Casey off and on since high school but added that she and Casey, who first met at church, were not planning to get wed.

She said: "We haven't really talked about it. Right now, we're just focusing on having a healthy baby."