By Kat Giantis
Paparazzi just happened to be on hand as the fair-haired, camera-ready pair went for a jog in the Hollywood Hills.
The outing made it clear that their somewhat fickle four-month romance is still a go, despite the possibility that he may soon become a father for the third time thanks to model-actress Knapp, who is reportedly due in June (Ryan is already dad to 11-year-old Ava and 7-year-old Deacon with altar-headed ex-wife Reese Witherspoon).
"Ryan and Amanda looked totally in love," enthused a shutterbug of their exercise session.
Meanwhile, no love appears to be lost between Phillippe and Knapp, who dated (apparently casually, according to sources) last year.
TMZ says the actor is ticked off with talk that he's been tightfisted with his former flame.
Her camp claims he hasn't contributed to the care and feeding of the work-limiting bun in her oven; his camp insists he's generously paid her expenses, even though he wouldn't have to until paternity is established.
Adding to Phillippe's alleged anger: Knapp supposedly agreed to keep her piehole closed in exchange for his financial support (according to Us Weekly, she spilled the beans last month at a party, and he was "blindsided" after hearing it through the grapevine. People, however, says he knew about the pregnancy from the beginning).
Harrumphs a Ryan insider, "File this under the category 'No good deed goes unpunished.'"
Knapp's rep is taking aim at the accusations by denying that the starlet has accepted Phillippe's cash -- or blabbed about the baby.
"She has never asked Ryan for any help, nor does she expect it," her rep tells People. "Alexis has maintained her silence and will continue to do so. Any 'source' claiming to have been her or her camp up to this point is false."
A Phillippe source has assured Us that if the child turns out to be his, "He'll take responsibility."
Beyonce rocks a one-piece, plus more of the best celeb swimsuit moments of summer 2015 thus far on today's Celebs Gone Social.Watch Video »
Bellamy Young chats attachment to her "Scandal" wig, dishes on her hopes for season five and more!Watch Video »
From Taylor Swift to Diane Kruger, check out the celebs with the best summer street style!Watch Video »
Check out Diane Kruger, Elizabeth Banks, and Kendall Jenner's style statements on OMG Celeb Fashion hosted by Wonderwall's Kirby Kristen.Watch Video »
Learn how you can get Jennifer Lawrence's fresh-faced glow at home on the latest episode of Wonderwall.com's DIY Celeb Makeup.Watch Video »
Jada Pinkett Smith, Amber Heard and co-stars dish on what it was like on set of "Magic Mike XXL" with Wonderwall.com's Kirby Kristen.Watch Video »
Like us on Facebook?
UP NEXTWeek in Photos
From Crowd Ignite