On Saturday, both Klum and singer husband Seal posted photographs of seven-week-old daughter Lou Saloulo Samuel on their Web sites.
Klum's site features three photographs set to hubby Seal's tune "A Father's Way." The first photo shows Heidi holding Lou against her chest, the second is a black and white portrait of the infant, and the third captures an intimate moment between father and daughter.
A fourth photo, a portrait of a smiling Klum with all four of her children, is available on Seal's site.
Lou Saloulo is the couple's third child -- they already have two sons together, Henry Gunther Ademola Dashtu Samuel and Johan Riley Fyodor Taiwo Samuel. Seal is also the adoptive father of Helene "Leni" Klum, who Heidi had with Flavio Briatore.
Though the couple married in Mexico in 2005, Klum only recently filed the paperwork to take on Seal's last name, Samuel.