Josh and Anna Duggar reveal their baby son's name.

Anna and Josh Duggar with baby Michael.

They managed to keep their son's name under wraps for a while, but just in time for Fathers' Day they revealed it. As the ultimate Fathers' Day gift, they named their son Michael James (sticking with the M-theme), after both their fathers.

The Duggar family just got bigger.

Anna and Josh Duggar with their newborn son.

Josh Duggar, Jim-Bob and Michelle's oldest son, and his wife Anna have added to their brood. Yesterday, June 15th, Anna gave birth to a healthy baby boy. He was born at home (Tontitown, Arkansas) at 5:55 p.m. and weighed 8 lbs 5 oz./3.75 kilo. Josh, 23, and Anna, 22, have not released their son's name yet, but will be sticking with an 'M' name. Jim-Bob and Michelle's children famously all have names that start with a 'J'.

Little baby boy Duggar joins big sister MacKynzie, 20 months old. MacKynzie won't be his only playmate though, since one of his aunts, Josie, is only 17 months older than he is.

Congrats to all Duggars. I'm curious what his name will be!