“Another beautiful baby to love. So lucky this baby is having number six,” added Patti.
Lauren shares five children with former Olympic swimmer Matt Welsh, Sam, 11, daughters Eva, nine, and Lola, six, as well as son Monty, two, and Perla.
Lauren’s father Bert has previously opened up about his grandchildren, saying they have brought him so much happiness.
“They wouldn't realise it at the moment, but they have made this one of the happiest times of my life,” he said.
“There is that old saying, "The wonderful thing about being a grandfather, or grandparent, is that you give the kids back".
“But in the case of Patti and myself, we don't want to.”