A source tells ET that Falchuk already has the ultimate seal of approval from Paltrow's mother, Blythe Danner.
"Blythe has told friends she has never seen Gwyneth happier," the source says. "Her mother adores Brad and feels Gwyneth has truly found the perfect partner."
"When Gwyneth speaks of Brad being emotionally mature, she truly feels that and she has the utmost respect for him and knows because of that, they can make it work for a lifelong future together," the source adds. "Brad is very communicative … he knows who he is as a person."
Paltrow shares two children, Apple, 14, and Moses, 12, with her ex-husband, Chris Martin. The kids "get along" with Falchuk "so well," the source notes, that getting married "just makes sense."
"Brad wants the fullest relationship and Gwyneth is ready. He gives his all, and he wants that back. Gwyneth says she has never felt she wanted to give so much of herself and has full trust and love with him. She never felt present in the past and Brad makes her feel wholly loved."
Paltrow wasn't sure if she wanted to marry again following her divorce from Martin in 2014, but according to our source, "Brad is the one man" that changed her mind, telling ET, "Brad's confidence and stability is exactly what she was looking for and didn't even know it. They are truly in love and all their friends are thrilled for them."
Last week, the bride-to-be opened up on Howard Stern's SiriusXM show about her relationship with Falchuk and how they're planning for their marriage.
"I think that I would like to give it a proper shot ... for myself," the mother of two said in regard to the concept of marriage following her and Martin's split. "I think there's something really beautiful about marriage. I think Brad is someone who is really intelligent, he's very emotionally intelligent. I think he's a really good person to try this with. He's very self-aware. He's got a lot of emotional maturity."
Paltrow also revealed whether she and Falchuk want more children and if they'll be getting a prenup. Check out her responses: