The exes are being factored into “X Factor” judge SIMON COWELL’s wedding!

Once-confirmed bachelor Cowell, 54, and baby mama Lauren Silverman, 36, are secretly planning to wed over the holidays, said a source, and he’s insisting his former girlfriends be included.

“Simon has told Lauren that his exes will always be a part of his life,” said the source.

Now he wants his former fiancee, makeup artist Mezhgan Hussainy, as well as longtime galpals, “Extra” correspondent Terri Seymour and singer Sinitta, to be bridesmaids at the bash, continued the source, “and Lauren seems to be fine with that.”

Lauren has apparently become close friends with Terri and Mezhgan, and both brought gifts to her English tea party baby shower at Simon’s Beverly Hills home in early December.

The showbiz mogul proposed after the shower, and now the couple is arranging their nuptials, according to the source.

“They’re planning an intimate ceremony with a yacht reception in Barbados between Christmas and New Year’s,” disclosed the source.

Simon wants to be married by the time Lauren delivers the baby – a boy he’s already referring to as Simon Jr. – in February.”

Cowell seemed like the world’s biggest cad when Lauren’s husband filed for divorce in July and it was revealed that Lauren was carrying the TV mogul’s baby.

But Lauren is now divorced, “and Simon has been strictly honorable with her,” said the source.

“He’s been at her side for the past several months, bonded with her father, thrown her a shower and quietly put a ring on her finger.

“Now it’s on to the wedding – with Simon’s exes in tow!”