Aidan O'Brien is confident that stamina won't prove the undoing of Marvellous in Friday's Investec Oaks at Epsom.

The daughter of Galileo was relatively unconsidered until shooting clear to win the Irish 1,000 Guineas at the Curragh in heavy ground, a performance which suggested she would have no trouble with an extra half-mile, although she is out of a Cherry Hinton winner.

"There's a lot of speed in Marvellous' pedigree, but she's by Galileo and they stay well," said O'Brien.

Joseph O'Brien overlooked Marvellous at the Curragh but is back on board at Epsom.

He said: "She won well in the Irish 1,000 Guineas, you'd imagine she'd get a mile and a half. It was very heavy ground and she looked to go to the line well. Hopefully she'll handle the better ground and get the mile and a half, she's in with a fighting chance."

Ralph Beckett saddled a famous one-two 12 months ago when Talent led home stablemate Secret Gesture, and is double-handed again after supplementing Lingfield Trial winner Honor Bound.

"Honor Bound has surprised us all. I was only hoping for black type at Lingfield. She doesn't work well at home and you wouldn't spot her in a crowd. But she's got the pedigree for it. She's a half-sister to Treasure Beach, who never won by too far, and he crept through the ranks like her. Whether she's capable of winning an Oaks is another question, but she deserves her chance," said Beckett.

"I was pleased with Regardez when she was third in the Musidora, where she came off a slow pace, looked like she was going to drop back and then ran on. I was doubtful whether she'd stay before that. Richard (Kingscote) won on her last year and his style of riding will suit her."

David Simcock also has two runners in Madame Chiang, winner of the Musidora Stakes at York, and Momentus, who was third at Lingfield. Simcock took Madame Chiang to Epsom for the Breakfast with the Stars morning and was happy with how she handled the track under William Buick.

"William said that coming down the hill she switched on to the right leg straight away and it is very pleasing. It was only a routine canter but all worked out very well," said Simcock.

"That was the first time William had sat on her. Kieren (Fallon) would have ridden her but he is on Ihtimal. We were looking for a suitable replacement and it was as much Kirsten's (owner Kirsten Rausing) decision as mine to put William on.

"Madame Chiang has a great attitude, nothing really fazes her and she will stay very, very well. She is very likeable and has got a great pick-up. She does not do anything particularly quickly, but she gets there.

"Momentus has got quite an ambitious owner and last year he had Miss You Too, who finished sixth. She is not a bad filly but would prefer faster ground. She is probably quicker than Madame Chiang but on this ground Madame Chiang would have the better chance."

Another supplemented filly is Hughie Morrison's Marsh Daisy, impressive at Goodwood in the Height of Fashion.

"Everything has gone well with Marsh Daisy. It's a big decision to supplement but in reality if a horse has won a trial and is in good form, you take your chance. The owner felt that you don't get many chances to have a Classic runner and I think it was the right decision to supplement," said Morrison.

"It's always a surprise when a filly progresses like she has, because we haven't done a lot with her. The only serious work she has done has been on the racecourse.

"I think it's an open race, but Marvellous has every right to be favourite because she looks as if she will stay. She's by Galileo from a wonderful family and I'm surprised she isn't 7-4. Of the others, we have all done well in trials. Taghrooda was impressive and I know they think a lot of her.

"You don't win a Musidora (Madame Chiang) and not have a chance, but you don't have to win a trial to win because fillies change so much. I think it's a strong race this year because we've had such a mild spring and a lot of fillies have come to hand earlier than normal."